Error Message: "Invalid job class: OCTaskProcessingSynchronousBackgroundJob"

[skleffmann]

Trying to improve the AI task pickup like described here Improve AI task pickup speed, I get the following error message when trying to start the SynchronousBackgroundJob worker in the terminal window of the container:

If I call the list with background jobs via 'occ background-job:list' the job is there:

And starting the worker via 'occ background-job:worker' also works and gives me an immediate answer in the assistant.

Any suggestions?

Thanks in advance, Sebastian