My mouse WAS on the unsupported list, and i wasnt able to use mouse inputs in the editor. Since adding unsupported devices, the mouse inputs work in the editor. BUT they do not work in the build. How can I sort this out?

Did your mouse work with other applications?
Do you have more than one mouse plugged in?
Hey there! So it turns out at some point on my projects development I made it so only keyboard and gamepad were supported controls. I added mouse and everything works fine now