IPv4 settings on hotspot

Got an issue on my new tablet with not connecting to castor. I’ve followed the guide and gone through and done the regedit fix, still no success.

I was going to try and turn off IPv4 on my hotspot connection. Turning off v6 is fine, but when I select manual, it asks me to manually add the v4 details. Hot do I determine what these are?

Your hotspot should provide IPv4 automatically, what sort of phone/router you using?