Hi Kyle,
Am currently trying to update the website to run on PHP 8.1.
I now have the following problem that is indicated in my backend (loads of references to CBLib...):Deprecated: Return type of CBLib\DependencyInjection\Container::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 894 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 905 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 917 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 939 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 894 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 905 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 917 Deprecated: Return type of CBLib\DependencyInjection\Container::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in joomla/libraries/CBLib/CBLib/DependencyInjection/Container.php on line 939
Where does it come from and how do I resolve it

Kind regards,

Tim