I am in 2.81 and created a bezier curve to act as a string in a scene. However, when I go to edit the curve, I grab the end point and attempt to move it on the x axis and it won't go that way. It will go on the z and the y but not the x.
I can go to object mode, rotate it to the right angle but that is not a very good work around.
I cannot find any place where I might have accidentally locked it.