PHP aktualizace

Dobrý den,

poradíte mi prosím s administrací stránky www.126fan.cz? Po přihlášení mi píše toto:

You are running PHP version 5.6.40 that is not supported by Wordfence 8.0.0. Wordfence features will not be available until PHP has been upgraded. We recommend using PHP version 8.1, but Wordfence will run on PHP version 7.0.0 at a minimum.

Nejde mi přidat nový příspěvek a nevím, jak mám provést aktualizaci PHP.

Udělal jsem aktualizaci na php 8.1 a teď mi to píše (všude – na webu i na admin):

Deprecated: Return type of WP_Theme::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 /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/class-wp-theme.php on line 505

Deprecated: Return type of WP_Theme::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 /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/class-wp-theme.php on line 546

Deprecated: Return type of WP_Theme::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 /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/class-wp-theme.php on line 484

Deprecated: Return type of WP_Theme::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 /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/class-wp-theme.php on line 493

Warning: Private methods cannot be final as they are never overridden by other classes in /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/class-wp-session-tokens.php on line 69

Fatal error: Array and string offset access syntax with curly braces is no longer supported in /data/web/virtuals/193688/virtual/www/domains/126fan.cz/wp-includes/script-loader.php on line 706

Děkuji za pomoc, MS