Vertex k8400 x-axis is blocked

Good morning, sir,

I’m coming to you because I’m completely lost.

My printer has been working properly for several years. I had a very rare use of it, only 15 prints in total.

I wanted to restart it, but a problem occurred. I started printing and the X-axis didn’t move anymore.

So I cleaned it up, I asked the printer to go back to its home point and it doesn’t move on the X axis. The motor acts as if it was jammed / seized up.

Impossible to move the axis. When I ask disable motors, the access and the motor become fluid again (by moving it by hand).

I don’t understand the problem so I don’t know what to do about it.
That’s why I am asking for your help.