[TYPO3-calendar] Can't show calendar entries after clicking on an entry at the list

[Ines Schiller]

Hello everybody,

I have a problem with the calendar.

I can see the list of calendar entries, but if I click on an entry, I get an error like this:

-----
Calendar Base Error

Message: Missing or wrong parameter. The event you are looking for could not be found.

Note: Please verify your URL parameter: tx_cal_controller[uid]
-----

I installed 

- Calendar Base (cal) 1.5.3
- RealURL 1.12.7

on Typo 3 - 4.7.17

I hope, you can help me.

Thanks