I had the same issue with a Wallbox for an X3 30e. After working initially, it would turn red on every charge. Worked until I synced their app. Wallbox customer service asked a lot of questions, wanted to know about the install, etc. they ended up sending a new one. The current one works 75% of the time. Seems to depend on what point I plug it in after turning the car off. Or if the battery is drained… either way, frustrating but I just reset the breaker and it works. You might have a defective unit or wiring/breaker size/ground is messed up. There is a dial in the Wallbox to choose charging amp limits, too. Good luck