Felix

``` Core: Exception handler (WEB): Uncaught TYPO3 Exception: In2code\Powermail\EventListener\FlexFormParsingModifyEventListener::getRequest(): Return value must be of type ?Psr\Http\Message\ServerRequestInterface, none returned | TypeError thrown in file /var/path/domain.de/typo3conf/ext/powermail/Classes/EventListener/FlexFormParsingModifyEventListener.php in line 92. Requested URL: https://www.domain.de/typo3/install.php?install%5Bcontroller%5D=upgrade&install%5Bcontext%5D=backend...