Linux client says: ERROR: Cannot stat "/run/user/1000/gvfs": Permission denied (13)

Hi all - I’m new to UrBackup and it runs fine locally and is able to back up local users’ home dir. But it fails on backing up from networked computers: The /var/log/urbackupclient.log notably contains these two lines at the timestamp of when I started an incremental file backup of the computer:

ERROR: Cannot stat "/run/user/1000/gvfs": Permission denied (13)
ERROR: Error while getting files in folder "/run/user/1000". User may not have permissions to access this folder. Errno is 0

There are several more error lines after this one but it looks like they’re all results of this line here.
–> Is that a problem on the client computer? How can I fix it?

Server = UrBackup 2.1.20 on Ubuntu 17.04.
Client = Ubuntu 17.04 desktop and used the UrBackup web interface to download the installer script for that desktop.