We are using Kolab in Plesk (completely updated both plesk/kolab and the OS). The pakage kolab-plesk is on version 16.0.1-17. Since several month we have the following problem. Plesk support was not able to help us any further.
On an iPad and iPhone with iOS 14.5/iPadOS 14.5 (also seen with the version before) we see the following situation when we have several tasklists synced via ActiveSync to the devices.
1. Adding an Entry to a Tasklist
2. The device tries to sync the new entry to the server
3. in the log file errors.log in kolab-sychrotron the following error occurs:
***
[2021-May-06 18:11:44 +0000]: PHP Error: No kolab_storage_cache class found for folder '' of type '' (POST /Microsoft-Server-ActiveSync?User=joachim@joachim-schweidler.de&DeviceId=KPUTS8O1K13L179TL8TAAM9ILS&DeviceType=iPad&Cmd=FolderUpdate)
[2021-May-06 18:11:47 +0000]: PHP Error: No kolab_storage_cache class found for folder '' of type '' (POST /Microsoft-Server-ActiveSync?User=joachim@joachim-schweidler.de&DeviceId=KPUTS8O1K13L179TL8TAAM9ILS&DeviceType=iPad&Cmd=Sync)
[2021-May-06 18:11:47 +0000]: PHP Error: No kolab_storage_cache class found for folder '' of type '' (POST /Microsoft-Server-ActiveSync?User=joachim@joachim-schweidler.de&DeviceId=KPUTS8O1K13L179TL8TAAM9ILS&DeviceType=iPad&Cmd=Sync)
***
4. The tasklist in which the entry should appear is moved and then appears as a subfolder of another tasklist. The new task is not added.
When only one tasklist exists the entry is added without problems.
Is this a known bug either in IOS od Kolab?
Many thanks in advance.
Best regards,
Joachim