http error 500  

Hola

Si se generó un error 500 debes tener detalle del error en el archivo error_log, este archivo esta como parte de los archivos de tu sitio, es un archivo de texto, puedes descargarlo y abrilo con algún editor de textos como notepad y ver los errores recientes.

Sino encuentras el error_log, busca también en wp-admin/error_log

También puedes pasar una revisión con la herramienta Stephan, esta disponible al hacer un ticket de soporte, revisa los errores recientes.

Cópianos los últimos errores reportados para tener una idea de qué puede estar causando el problema.

Revisa:
https://www.webempresa.com/blog/que-es-un-error-500-y-como-localizarlo-en-nuestra-web.html

Saludos.

Estos son los últimos errores reportados
[08-May-2018 17:40:39 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:40:48 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:40:53 Europe/Berlin] PHP Fatal error: Call to undefined function force_ssl_admin() in /home2/amarasel/public_html/wp-login.php on line 15
[08-May-2018 17:40:57 Europe/Berlin] PHP Fatal error: Call to undefined function force_ssl_admin() in /home2/amarasel/public_html/wp-login.php on line 15
[08-May-2018 17:42:20 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:43:26 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:43:30 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:43:32 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:43:57 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:44:21 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:44:25 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:44:54 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:45:12 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:47:50 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:47:56 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:47:57 Europe/Berlin] PHP Fatal error: Call to undefined function force_ssl_admin() in /home2/amarasel/public_html/wp-login.php on line 15
[08-May-2018 17:48:06 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:48:06 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:24 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:31 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:32 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:33 Europe/Berlin] PHP Fatal error: Call to undefined function force_ssl_admin() in /home2/amarasel/public_html/wp-login.php on line 15
[08-May-2018 17:49:37 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:37 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:39 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:41 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:43 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:49:44 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:25 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:28 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:35 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:45 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:46 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:50:47 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:51:03 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:51:39 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:52:28 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:52:45 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:53:56 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:54:08 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:54:09 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:54:09 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 17:55:14 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:19] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:21] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:21] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:30] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:41] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:00:41] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:01:27] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:01:27] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:01:35] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:01:37] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:01:50 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:02:02 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:02:20 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:02:21 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:05:34 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:05:34 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:05:55 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:06:01 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:06:26 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:06:29 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:06:31 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:06:42 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:13:24 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:21:15 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:21:33 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:21:34 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:21:36 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:32:20 Europe/Berlin] PHP Fatal error: Call to undefined function force_ssl_admin() in /home2/amarasel/public_html/wp-login.php on line 15
[08-May-2018 18:33:56 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:44:57 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:47:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:47:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:47:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:55:53 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:56:22 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 18:57:24 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:12:24 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:17:18 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:20:25 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:20:29 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:20:32 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:20:34 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:24:08 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:36:13 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:36:13 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:36:13 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:39:02 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:39:21 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:39:32 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:39:59 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:40:33 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:49:06 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:49:47 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:49:47 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:49:47 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:51:43 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:52:31 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 19:53:23 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 20:00:15 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 20:00:18 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 20:01:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 20:01:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16
[08-May-2018 20:01:10 Europe/Berlin] PHP Fatal error: Call to undefined function wp() in /home2/amarasel/public_html/wp-blog-header.php on line 16

Hola

Los errores se reportan en archivos del sistema, al parecer la actualización por alguna razón no fue bien, posiblemente porque no hubo espacio o algo similar

Lo más práctico sería que recuperes una copia de tu sitio antes de los problemas, si no tienes copia de seguridad puedes usar algunas que te crea tu cuenta de hosting, revisa:
https://guias.webempresa.com/preguntas-frecuentes/gestionar-copias-seguridad-superbackup/

Saludos.

Gracias Jhon, intentamos restaurar una copia de seguridad y tampoco funcionó, no tengo muy claro si por problemas de espacio....

Hola

Primero asegúrate de tener espacio suficiente para operar en tu cuenta, incluso si vas a realizar un respaldo, comunícate por tickets para ver si te pueden ampliar temporalmente en caso no puedas liberar espacio, deberías tener libre al menos el 10% de tu cuenta

Intenta nuevamente la restauración de una fecha anterior al proceso de actualización que has realizado.
Recuerda restaurar archivos y Base de datos, ambos de la misma fecha.

Saludos.