I am having similar difficulties with pCloud as well. I have detailed the issues in this thread:
and opened a github bug report here: pCloud Webdav sync issues with Joplin · Issue #2136 · laurent22/joplin · GitHub
Cross-posting is not gonna change the facts, which we have already explained in the other topic you have created.
This issue is fixed.
Looking at my error log it looks like Joplin sync is failing on a filename ending with a double slash:
https://rtvb.stackstorage.com/remote.php/webdav/Apps/Joplin//
(Please mind the double slash at the end!)
I am suspecting that the original change or the fix above have caused this.
AFAIK the fix dealt with servers redirecting requests. Maybe there’s a special edge case where this double slash at the end happens.
@metbril, could you open a bug report on GitHub about the double slash please? Not sure if it’s the recent change that did this but will check.
I will.
The thing is, I’m syncing an iPhone, iPad, MacBook and iMac with my WebDAV endpoint.
Both Macs are running 1.0.174 and are syncing just fine.
The iPhone and iPad both use 10.0.40 and generate the exact same error.
So to me it looks like the WebDAV is working fine, but there is an issue with the iOS app. I don’t know how different the codebase is from the Electron app, however.
Would you still like me to create an issue at GitHub?
Code base is the same for both, but the iOS network stack can be funny so it’s sometimes needed to tweak the code a bit. The best is to create an issue for now so that it can be tracked (as posts on the forum are not).
Done! 
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