Outgoing HTTP ports 80 and 443 must be open to the printer. If your local network does not allow the printer to access those outgoing ports, then the printer’s attempts to connect to the Polar Cloud will not fully succeed.
In terms of LED lights, the symptom you will see when the rest of configuration was successful but now the printer can’t access the outgoing HTTP ports is that the LED lights will be blue over yellow: POLAR3D.
Make a note of your printer’s IP address (if you are using a static IP address) and its MAC address and contact your IT or network administrator to ask them to open up access for your printer.