Do you experience problems during downloading?
Check your connection in Status and Interface settings window.
Use Test Server in Config > Servers.
We will probably ask you to do a test using only basic settings.
Do you experience problems during repair or unpacking?
Enable +Debug logging in the Status and Interface settings window and share the relevant parts of the log here using [ code ] sections.
I even gave "sc-download" the ownership of that folder - but as soon as I restart my Synology (which is hapening every day, as it is not 24/7 running) it is always back to "admin" as owner of that folder and therefore the message in SAB is showing up again.
The problem was totally gone during my SAB on Docker experience... where am I making a misstake?
What I can say is that usually you have to make sure the whole share is set to "Use Windows ACL" and that you make sure to set the permissions changes to propagate to children etc.
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As far as I understand the Windows ACL thing is only relevant for folders that have been created before DSM 5, so that does not apply for my situation.
I have another idea that I want to try and I will report about it later that day if it was a success
I deleted the incomplete folder so that SAB was recreating it by itself a moment later and now - after a restart of my Synology - there is no silly error message showing up Hopefully it will stay that way...
Hopefully it will stay that way...