I admit, the first puck I prepared this morning I have a very gentle tamp and it fell apart when I turned the portafilter over to get rid of the loose grounds, so I then tamped with a bit more force- likely too much.
Can you turn down the pressure of the machine?
Have you purged the group head?
If you're still having trouble maybe try a puck screen.
@Dogs started
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I admit, the first puck I prepared this morning I have a very gentle tamp and it fell apart when I turned the portafilter over to get rid of the loose grounds, so I then tamped with a bit more force- likely too much.