We are seeing these errors in multiple places.
One way to reproduce: register and select subsribe to newspaper.
In that case, we are seeing these errors (there are other related issues on deprecated code, but none that deal with TagCollection Class"
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: Return type of CleverReach\BusinessLogic\Entity\TagCollection::count() should either be compatible with Countable::count(): int, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).
Deprecated function: CleverReach\BusinessLogic\Entity\TagCollection implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in require_once() (line 10 of modules\contrib\clever_reach\lib\BusinessLogic\Entity\TagCollection.php).