Hmm at the beginning of my test, I got the same behavior: occasionally authentication errors like the one from your log file:
D 20180308141040.447 OkHttp <-- 401 Unauthorized https://webdav.pcloud.com/[_path_] (411ms)
D 20180308141040.448 OkHttp Date: Thu, 08 Mar 2018 20:10:41 GMT
D 20180308141040.449 OkHttp Server: Apache/2.4.10 (Debian)
D 20180308141040.450 OkHttp Keep-Alive: timeout=5, max=98
D 20180308141040.455 OkHttp Connection: Keep-Alive
D 20180308141040.463 OkHttp <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>401 Unauthorized</title>
</head><body>
<h1>Unauthorized</h1>
<p>This server could not verify that you
are authorized to access the document
requested. Either you supplied the wrong
credentials (e.g., bad password), or your
browser doesn't understand how to supply
the credentials required.</p>
<hr>
<address>Apache/2.4.10 (Debian) Server at webdav.pcloud.com Port 443</address>
</body></html>
After a few minutes the error is gone so I’m not able to reproduce it anymore.
Is it the first time that you’re facing this issue or does it often occur? Maybe they have server problems but I will check that later again.
Increased the logging verbosity but since today, I’m unable to get this error happen anymore. It looks for me that they have solved server issues. @8n2cij do you get any errors right now?