I have setup a CUPS server with the web interface. Sadly I'm unable to add a printer by doing the following steps:Browser (REMOTE_SERVER_IP:631)Administration tabLocal Printers HP Printer (HPLIP) Connection Add Printer (name and all the good stuff) Select modelSelect DriverErrorAt this point I get the message: Unable to add printer: Unauthorized. My configuration file looks like this:# Disable cups internal logging - use logrotate insteadMaxLogSize 0# Log general information in error_log - change warn to debug# for troubleshooting...LogLevel warn#PageLogFormatListen /run/cups/cups.sockListen 0.0.0.0:631Port 631BrowseAddress *.*.*.*:631BrowseAllow all# Show shared printers on the local network.Browsing OnBrowseLocalProtocols all# Default authentication type, when authentication is required...DefaultAuthType None# Web interface setting...WebInterface Yes# Restrict access to the server...<Location />  Order allow,deny  Allow All</Location># Restrict access to the admin pages...<Location /admin>  Order allow,deny  Allow All</Location># Restrict access to configuration files...<Location /admin/conf>  Order allow,deny  Allow All</Location># Restrict access to log files...<Location /admin/log>  Order allow,deny  Allow All</Location>I'm using the following Dockerfile to build and start the whole thing. I also provide a new user inside the image.What am I missing?
Unable to add printer: Unauthorized when adding a printer using the CUPS web interface
docker;cups;printer