Hola de nuevo,

he hecho una actualización de la plantilla, wordpress 6 , plugins y php7.4 y cuando intento pasar a la version php8.1 me da un error.

Si desconecto la plantilla Archi por una de las que viene por defecto en wordpress, los errores desaparecen .

También he probado a desconectar los plugins de contact form 7, Backup, etc...

There has been a critical error on this website.

Estos son los errores que aparecen:

Deprecated: Return type of WPCF7_FormTag::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/form-tag.php on line 396

Deprecated: Return type of WPCF7_FormTag::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/form-tag.php on line 388

Deprecated: Return type of WPCF7_FormTag::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/form-tag.php on line 382

Deprecated: Return type of WPCF7_FormTag::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/form-tag.php on line 400

Deprecated: Return type of WPCF7_Validation::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/validation.php on line 78

Deprecated: Return type of WPCF7_Validation::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/validation.php on line 72

Deprecated: Return type of WPCF7_Validation::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/validation.php on line 59

Deprecated: Return type of WPCF7_Validation::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/contact-form-7/includes/validation.php on line 82

Deprecated: Return type of HMBackUpWordPressCleanUpIterator::accept() should either be compatible with FilterIterator::accept(): bool, or the #[ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/backupwordpress/classes/class-path.php on line 456

Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/formatting.php on line 5385

Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/formatting.php on line 5385

Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php on line 7035

Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php on line 2164

Warning: Cannot modify header information – headers already sent by (output started at /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php:2164) in /srv/vhost/innerxxi.es/home/html/wp-admin/includes/misc.php on line 1380

Warning: Cannot modify header information – headers already sent by (output started at /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php:2164) in /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php on line 6878

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/00really-simple-ssl2/class-server.php on line 51

Deprecated: Constant FILTER_SANITIZE_STRING is deprecated in /srv/vhost/innerxxi.es/home/html/wp-content/plugins/00really-simple-ssl2/class-server.php on line 51

Warning: Cannot modify header information – headers already sent by (output started at /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php:2164) in /srv/vhost/innerxxi.es/home/html/wp-admin/admin-header.php on line 9

Deprecated: setcookie(): Passing null to parameter #5 ($domain) of type string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/option.php on line 1112

Warning: Cannot modify header information – headers already sent by (output started at /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php:2164) in /srv/vhost/innerxxi.es/home/html/wp-includes/option.php on line 1112

Deprecated: setcookie(): Passing null to parameter #5 ($domain) of type string is deprecated in /srv/vhost/innerxxi.es/home/html/wp-includes/option.php on line 1113

Warning: Cannot modify header information – headers already sent by (output started at /srv/vhost/innerxxi.es/home/html/wp-includes/functions.php:2164) in /srv/vhost/innerxxi.es/home/html/wp-includes/option.php on line 1113 Podríais decirme donde está el error? o si no es compatible con esta version de php o de wordpress?

Muchas gracias!