Thank you for the question. I can help you with this. Did the brew unit come out of the machine with no problem? If so then the problem may well be with the brew unit itself. The brew unit must be in the home position to fit into the Coffee maker. Home position means that basket must be centered directly under the funnel on top. And the screen filter must be pushed all the way down. You can to manipulate the unit back and forth to get everything to line up properly. Don't force it too hard. The plastic pieces can break.
Let me know what you find out- Ray