Shiptheory Support

In the event CUPS won't open, a potential fix is as follows:

The firewall could be causing an issue here, it's just a case of disabling it. This is done by navigating to the "Network" tab of the System Settings. There we can see the status of our firewall.

Once there, click on "Firewall"

Here we can toggle the firewall on or off. At this step you may be prompted to input your password for your device before saving any changes.