[TYPO3-calendar] frontend editing &cHash empty

[Hauke Haller]

Hi,
when saving an added event, I get the errormessage:

Reason: Request parameters could not be validated (&cHash empty)

where can I add the cHash? Setting
plugin.tx_cal_controller.view.month.event.addLink.typolink.useCacheHash = 1

doesn't work. At least it appends a cHash to the add-icon-link.

Hauke