Serialization of 'Closure' is not allowed

[infabo]

PHP 7.3 + TYPO3 9.5.7

[KamiYang]

Using a TYPO3 9.5.7 introduction package installation in combination with a php 7.3.5 fpm, I cannot reproduce this error.
Any chance to provide more information about the typo3 installation? Any other 3rd party extensions? Or how exactly this can be reproduced?

[infabo]

I can give you the var_export of the variable to serialize, looks not very helpful though:

TYPO3\CMS\Adminpanel\ModuleApi\ModuleDataStorageCollection::__set_state(array(
))

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https://github.com/TYPO3-Initiatives/adminpanel-extended/blob/develop/Classes/Modules/HooksAndSignals/Hooks.php#L76

https://github.com/TYPO3-Initiatives/adminpanel-extended/blob/develop/Classes/Modules/HooksAndSignals/Signals.php#L96