Problems with WebDAV; but web and desktop client OK

Hello,

I am a user (no access to the admin area) of a Nextcloud instance. I did a search and didn’t see mention of my exact problem. So before I try to get help through the hosting site, I wonder if there is anything the community can provide that I can relay to the hosting site admins.

Here is what works no problem:

  • I can log into the web page and upload and download files
  • I can also use the desktop sync client
  • I can mount the WebDAV mount in Windows 10 and see files/directories
  • I can use rclone to connect to the WebDAV mount and list files/directories
  • I can download files in Windows 10 or using rclone
  • I can create directories in Windows 10 or using rclone
  • I can delete files in Windows 10 or using rclone

What does not work:

  • I cannot upload any files of any size/type using the mounted Windows 10 share
  • I cannot upload any files of any size/type using rclone

This problem happens every time - I have never been able to succeed in the steps above.

Since I do not have access to the admin area, this is the only information I have from the failed rclone attempt:

$ rclone -v copy webdav.sh h2:test123/
2018/10/15 13:11:14 ERROR : webdav.sh: Failed to copy: 406 Not Acceptable
2018/10/15 13:11:14 ERROR : Attempt 1/3 failed with 1 errors and: 406 Not Acceptable
2018/10/15 13:11:16 ERROR : webdav.sh: Failed to copy: 406 Not Acceptable
2018/10/15 13:11:16 ERROR : Attempt 2/3 failed with 1 errors and: 406 Not Acceptable
2018/10/15 13:11:17 ERROR : webdav.sh: Failed to copy: 406 Not Acceptable
2018/10/15 13:11:17 ERROR : Attempt 3/3 failed with 1 errors and: 406 Not Acceptable
2018/10/15 13:11:17 Failed to copy: 406 Not Acceptable

Is there some WebDAV setting which may be missing?

Nextcloud version (eg, 12.0.2): 13 something
Operating system and version (eg, Ubuntu 17.04): Unknown
Apache or nginx version (eg, Apache 2.4.25): Unknown
PHP version (eg, 7.1): Unknown

Thanks for any help you can provide.