No puedo entrar en Admin. Error Warning: Illegal string offset 'payin7' in /homepages/.../Hook.php on line 554

[Air Custom]

Hola buenos dias.

Despues de cambiar de dominio mi antigua web a un sudominio perdí mi acceso a web (en ese subdominio) y al administrador back office. Me reportaba un error 500. Active el "debug de errores" y ahora me reporta los siguientes fallos:

1- EN URL de ADMIN: 

* Warning: Illegal string offset 'payin7' in /homepages/.../classes/Hook.php on line 554

Notice: Array to string conversion in /homepages/.../classes/Hook.php on line 554

2 -EN URL de Front Office:

 

Warning: Illegal string offset 'payin7' in /homepages/.../classes/Hook.php on line 554

Notice: Array to string conversion in /homepages/.../classes/Hook.php on line 554

Warning: Cannot modify header information - headers already sent by (output started at /homepages/.../classes/Hook.php:554) in /homepages/.../classes/controller/FrontController.php on line 1000

Warning: Cannot modify header information - headers already sent by (output started at /homepages/.../classes/Hook.php:554) in /homepages/.../classes/controller/FrontController.php on line 1001

Warning: Cannot modify header information - headers already sent by (output started at /homepages/.../classes/Hook.php:554) in /homepages/.../controllers/front/PageNotFoundController.php on line 39

Warning: Cannot modify header information - headers already sent by (output started at /homepages/.../classes/Hook.php:554) in /homepages/.../controllers/front/PageNotFoundController.php on line 40

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Crypt_RSA has a deprecated constructor in /homepages/.../modules/googleshopping/lib/phpseclib/Crypt/RSA.php on line 280

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Crypt_Hash has a deprecated constructor in /homepages/.../modules/googleshopping/lib/phpseclib/Crypt/Hash.php on line 82

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Math_BigInteger has a deprecated constructor in /homepages/.../modules/googleshopping/lib/phpseclib/Math/BigInteger.php on line 176

 

Este prestashop es el antiguo pero quiero tenerlo utilizable (aunque algunos modulos no me funcionen) ya que quiero poder entrar en el backoffice para poder descargar facturas de antiguos pedidos y alguna información mas.