EleksCAM does not work

Hello
An error has occurred on the laser bench with Elekscam

When I download and run the program, it gives the attached error message.

I understand that I can’t get the port
however
if you try to move the laser head on the bench before loading the program, the first movement is done beautifully, but the second movement is not. After the second command of a new movement, it gives the error message “still work in running” … it crashes (closes elekscam) and briefly flashes a message similar to the error message in the attachment (can’t read)

The head can be moved in both directions and to different extents, but only once.
The laser is not turned on - off

The machine was working properly when it was last used in the spring.

Can anyone help how to get the machine working again?