Cache management: Unable to Connect

Have configured ipfire and probably working ok, except for Cache management, which after Cache Manager Interface connects to Unable to Connect - Firefox can’t establish a connection to the server at 0.0.0.0.

Apparently something is not configured correctly. Any ideas?

Firefox can’t establish a connection to the server at 0.0.0.0.

This is not a valid IP address to make connections to.

Thanks Peter. I knew that! I meant: How did that address enter into
the configuration.

The Cache Manager, its web page response " Unable to connect
Firefox can’t establish a connection to the server at 0.0.0.0." Something/somewhere is blocking the connection. Any ideas why?

Could you please provide screenshots of your proxy/cache manager configuration?

The configuration was just uploaded under networking. Here it is again:

Additionally. ipfire mini appliance.