webdav not working anymore

The setup is ISPConfig 3.1.6
lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description: Debian GNU/Linux 8.9 (jessie)
Release: 8.9
Codename: jessie

The server is in production mode for over one year and working great! The webdav user setup was working for a while but now the users can't log in.
Here is the log:
[Sun Sep 10 23:05:19.884991 2017] [auth_digest:error] [pid 16884] [client 192.168.0.95:50812] AH01790: user `clienttest' in realm `Restricted Area' not found: /webdav/test/
The clienttest/password is good and valide. I tried recreating it with the same result.

Anybody has an idea of the source of the problem?

Thanks
Spazio

 

I have the same problem.
ISPConfig version is 3.1.6
Distributor ID: Debian
Description: Debian GNU/Linux 8.9 (jessie)
Release: 8.9

Sep 18 15:23:36.243167 2017] [auth_digest:error] [pid 2004] [client 87.79.179.69:58555] AH01790: user `***' in realm `Restricted Area' not found: /webdav/***

Thanks for answers.
Julius

 

Same problem here, have upgraded to 3.1.6 on Debian 9 and now receiving AH01790 authentication errors for all WebDAV users.

 

Heh, just found that myself!

 

Same problem on CentOS 7.4 with ISPconfig 3.1.6

 

Now, with isconfig Update 3.1.7 everything woks fine. Thank you Till.

 

Cool!!! I will try after backup. Thanks for your information.