SCP GFX for an ad won't let me rotate on any axis other than the X axis?

Hi, so I’m making ads for an SCP Group. I’m using a rig that I just need to insert the clothing textures and extra details but when I rotate the arms I can’t rotate them on the Y and Z axis. I can only rotate them X axis which is a problem because I want it to be able to hold a gun.

Oh by the way its the lower arm doing it.

This isn’t the right place for this, this is for roblox feedback not blender feedback