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Serial port Error 11: No such file or directory in grbl 1.1.7

Im using a chines mini cnc 3018. It makes great things but it losing connection and stops, Sometimes after several hours and sometimes after 2 minutes. It uses the controller board woodpeeker 3.0 “Serial port Error 11: No such file or directory”

Anyone here knowing what to do?

Göran

Same problem, did you solve it ?

Thanks