When swapping mods, I commonly am unable to move when I load into the game. Sometimes a mouse cursor stays on screen and I am unable to perform any character actions. Other times I am able to shoot but not manage inventory or move.
This behavior is common when using and changing mods.
The workaround is to quit and re-enter the game. The mods loaded does not matter - it even occurs without any mods loaded at all (after you've disabled them)
Platform: PC