Melitta Barista T abort after grinding process

Hello all,

I have here times a question in the round and hope that here possibly one knows the problem.

Here is a brief description of the error
:Product: Melitta Barista

TFError: The coffee machine ejects the ground coffee directly after the grinding process and reports the error that the bean compartment is empty.
When the coffee is ground again, the machine works normally.
The problem only occurs in the Café Crema and Latte Macchiato programs, no error occurs in Espresso, Cappuccino.
Furthermore, I think that when the error occurs, the grinding process sounds higher, or shriller.

I have already largely disassembled and cleaned the machine in this regard. In addition, the grinder came new about 8 months ago. The error already occurred before, but became less in the meantime.

I hope you know what to do and I'm curious to see what happens.

Thanks in advance for your suggestions, if you have any questions just write to me, let's see if I can answer them.

Greetings Globali