Troubleshooting-Gaggia-Super-Brew-Unit-Stuck
From Whole Latte Love Support Library
If the brew unit of your machine is stuck in place do not try to force it out of the machine. This will more than likely result in the brew unit breaking or other damage being done to the machine. Forced removal of the brew unit can cause the machine to fail in a way that will only be able to be repaired by professional technician. Follow the instructions in the video below to get the brew unit reset to the proper position.
How to Remove a Stuck Brew Unit