Errpr Deprecated: Return type of Pimple\Container

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We are getting errors generated on our admin pages of the following form “Deprecated: Return type of Pimple\Container::offsetSet($id, $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 /******/*****/*****/wp-content/plugins/post-expirator/vendor/pimple/pimple/src/Pimple/Container.php on line 79”

Similar errors are reported for line 143, line 98 and line 133,

We aren’t seeing any functional problems and it only shows on the admin pages, so the site is working.

Thought you might like to know about the errors in plugins/post-expirator.

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