My Dataflow stopped working

It will tell you in the details why it stopped. You'll need to translate it into English for the broadest visibility here. You could also copy and paste the M code from there and paste into Power BI Desktop in Power Queyr and manually refresh to see what it returns. But the code could be ok, but login permissions are wrong, you have an old gateway, a table has change format, or gone missing entirely, etc. The reasons can be infinite. 

 

What you've done is like calling your car mechanic and said "My car won't start. It used to. What is wrong?" and expecting them to diagnose over the phone. Details. We need details. 😁