sync error

Report ID: 744366849
Since a few weeks I use the sync option, which is great. I normally use the same laptop in different settings (home and work). I use the webdav of my institute to files. Yesterday the same sync error appeared several times (unfortunately forgot the reportID).
Today I have tried to sync to another computer, which succeded well initially. Meanwhile I have worked off-line on my laptop and wanted to sync again, but I can't recover some files I'm certain to have added this morning. Apparently something has gone wrong, but I don't what.
Please help me, maybe I have overlooked something.
  • Report ID 855731542
    I have restarted Firefox several times, but the problem is still occuring. Please help me.

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