Calendar plugin needs group visibility

[srosset81 (Sébastien Rosset)]

@renato

Note, however, that the user creating the event must be able to see the groups defined as allowed groups. Did you happen to change these visibility levels for your automatic groups?

Thanks, the visibility was limited to the group owner, and changing it to all logged users solved the problem indeed ! Sorry for making bold assumptions, I didn’t explore the problem long enough.