Orchestrator PENDING state

A sudden problem has occurred which I cannot find the cause to.

I have several jobs with two different user logins on the same machine that runs from Orchestrator, which until recently have worked well.

Every time I now run a job either manual or scheduled from Orchestrator - with “user_1” - getting status as “Pending”. It is only the one job the robot has to take care of at the present time and there is no other job running on that machine.

The same job can run with “user_2” without any issue.

Do you have any suggestions?