42100 & Contol+ problem

I'm rebuilding my 42100 after a while. I'm stuck at the end of the first part, when testing my assembly with Control+ app. Looks like it finds and can communicate with the hub (it tells me if there is a wrong connexion of the motors...) but nothing happens when testing to rotate the tracks... Anybody had the same issue ? submitted by /u/Modular_Convent [link] [comments]