[TYPO3-calendar] Cal Frontend create Event Error

[Bernd Pier]

Hi,

i have Typo3 7.6 cal 1.10.3 PHP 7 on my Server. i have activate Frontend 
Editing and want to create an Event. Getting this PHP Warning:

#1: PHP Warning: Declaration of 
TYPO3\CMS\Cal\View\CreateEventView::getFormStartMarker(&$template, 
&$sims, &$rems) should be compatible with 
TYPO3\CMS\Cal\View\FeEditingBaseView::getFormStartMarker(&$template, 
&$sims, &$rems, &$wrapped) in 
/homepages/42/d436805399/htdocs/customers7/celseo/typo3conf/ext/cal/Classes/View/CreateEventView.php 
line 23

Even it is a Warning not an Error i can`t create an Event.

As far as i understand the Parameters are different.

Any Help is welcome.

Bernd P.