Problema actualizando PHP

[trabajoforo]

Actualicé la versión de php desde el propio proveedor, y tengo una versión no actualizada de wordpress.

Lo ponían fácil no, lo siguiente, simplemente era seleccionar php en un desplegable y sin ningún otro aviso actualizado. Y todo comenzó a fallar. Ahora ya he quitado por ftp algunos plugins que daban error y parece que solo me queda modificar este fichero pero no sé cómo, a ver si por el error me sabéis decir...

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::init() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_title() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_keywords() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_description() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_google_verification() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_bing_verification() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_alexa_verification() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405

Strict Standards: call_user_func_array() expects parameter 1 to be a valid callback, non-static method BasicSEO::print_google_analytics() should not be called statically in /homepages/24/d353313077/htdocs/back up 1and1/wp-includes/plugin.php on line 405