Error message: no valid files. "keine gültigen Dateien" !!!

Hello, i need your help. I have an Abo for PS LRC and i use also BR 2020 (bridge).  I can not import the Raw files from my canon-eos-5d-mk2.  

Error message: no valid files

Thank you i wait for help. 

I am from Austria, you can also speak germany with me.

Best regards

Hansl