PREFERENCIA DE PAGO  

Hola Jose Juan.

Revisando la instalación veo los siguiente errores:

[06-Jun-2022 09:44:48 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_NewProducts, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_newproducts/ps_newproducts.php on line 37
[06-Jun-2022 09:50:59 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_Checkpayment, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_checkpayment/ps_checkpayment.php on line 0
[06-Jun-2022 09:53:57 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_Checkpayment, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_checkpayment/ps_checkpayment.php on line 0
[06-Jun-2022 09:56:30 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_NewProducts, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_newproducts/ps_newproducts.php on line 37
[06-Jun-2022 09:56:45 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_Checkpayment,
 because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_checkpayment/ps_checkpayment.php on line 0
[06-Jun-2022 10:05:15 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_NewProducts, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_newproducts/ps_newproducts.php on line 37
[06-Jun-2022 10:07:26 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_Wirepayment, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_wirepayment/ps_wirepayment.php on line 0
[06-Jun-2022 10:07:44 Atlantic/Canary] PHP Fatal error:  Cannot declare class Redsysoficial, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/redsysoficial/redsysoficial.php on line 0
[06-Jun-2022 10:17:28 Atlantic/Canary] PHP Fatal error:  Cannot declare class Redsysoficial, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/redsysoficial/redsysoficial.php on line 0
[06-Jun-2022 10:20:39 Atlantic/Canary] PHP Fatal error:  Cannot declare class Ps_NewProducts, 
because the name is already in use in /home/mupejees/public_html/webprestashopbqCANARIAS/modules/ps_newproducts/ps_newproducts.php on line 37

El error es porqué se esta llamando a una clase varias veces.

.- Accede a la carpeta Modules y renombra la carpetas " redsysoficial "

.- Actualiza la version de prestashop y los modulos que tienes pendiente

.- Modifica la version de PHP e instala la 7.4

Revisa si con estos pasos se soluciona.

Un saludo