Error executing subquery id: "36165" Fehlercode: 1B885FB3

Hello everyone, 

since I replaced my data source with a new SQL, I keep getting this error message: 

Aktion konnte nicht ausgeführt werden 

Error executing subquery id: "36165" 

Fehlercode: 1B885FB3 

Logical Query missing field [__measure__2] from joinOp. This is an invalid query.

What's causing this? Can you help me? 

Thank u so much!