Hi,
I'm trying to export a calendar an get the following error: "Unable to calculate first occurrence". This error is listed under https://oxpedia.org/wiki/index.php?t...ror_list_7.4.0 as "APP 79" error.
The funny thing is that this only occurs in one of many calendars. Is there any solution?

We use:
Frondend: 7.4.2 Rev8
Server: 7.4.2-Rev9