TYPO3 Core

PHP 7 native Errors seem to create a Fatal Error.

I installed powermail 2.19.0 and now get the following error (both in FE and BE):

Fatal error:  Uncaught TypeError: Argument 1 passed to TYPO3\CMS\Core\Error\AbstractExceptionHandler::handleException() must be an instance of Exception, instance of Error given in .../typo3_src-7.6.0/typo3/sysext/core/Classes/Error/AbstractExceptionHandler.php:36
Stack trace:
#0 [internal function]: TYPO3\CMS\Core\Error\AbstractExceptionHandler->handleException(Object(Error))
#1 {main}
  thrown in .../typo3_src-7.6.0/typo3/sysext/core/Classes/Error/AbstractExceptionHandler.php on line 36