The extension xclassed TYPO3\CMS\Belog\Controller\BackendLogController
and
tries to add an additional dependeny using controller DI.
In the current state, it is not possible to open the BE log module any more,
since DI for TYPO3\CMS\Belog\Controller\BackendLogController
only has 3
arguments but the xclassed version expects 4.
Thanks to @lukasniestroj for pointing out the solution of the problem.