I have an asset from the Unity asset store called UHFPS (Ultimate Horror FPS Kit URP) by ThunderWire Studio.
Unfortunately when both packages are installed UHFPS mouse look breaks. Its like the mouse can no longer be attached to the game window. It will still detect mouse interaction with UI, but it no longer will mouse lock or hide the mouse, and camera look doesn't move. I have tried fixing it with Playmaker, but the FSM also can't hide or lock/look with the mouse.
I have spoken with ThunderWire Studio's and they think it has something to do with script load priority and think Playmaker disrupting the script load order; maybe changing a pointer somewhere. They looked into it however later responded by saying it was beyond them. They can reproduce it, but ultimately didn't understand how the Playmaker system worked and advised I request help form Playmaker support.
I have tried loading Playmaker first, and after, however once I create a Playmaker FSM, thats right when it breaks. No errors, just no longer works. I have tried doing the pre-install compatibility check and it finds no issue. Also uninstalling/reinstalling Playmaker or UHFPS won't fix it. A new project is the only solution.
I hope I posted this in the right spot and that this is a simple fix. Any help would be appreciated.