Error after program abort

Again a JURA (Impressa E20) landed at my place (daughter...) apparently the cleaning or descaling program was aborted.
The machine was switched off in the meantime. Now it alternately shows Open steam nozzle, when you open it the steam symbol appears and the machine tries to build up pressure, then the display shows Close steam nozzle (without something coming out of the nozzle), then it shows Open steam nozzle again.......
Do not come out of the loop.
Is there an input code to end the program? Or is there the possibility to do a reset? Test mode? I have a lot of experience with JURA machines, but I haven't had this situation yet.
I would be very happy to receive tips!
Thank you! Andy

Sounds like the machine needs to be vented. Think there's a blockage or the pump is defective.
If you have the machine open, you can see if the pump is humming softly.
If so then there is a blockage in front of the F-manifold.

Super thanks!!! Then I'll do the classic checks. I'm afraid "past life/maintenance" are unknown to me....

Thanks! Andy!