VESC Balance app stuck in 'calibrating' state

Hey guys!

I’m currently building my DIY onewheel using an older Vesc 4.12 running FW 5.1. I have hooked up everything and started the balance app, but neither my adc inputs, nor my mpu9250 work. On the bottom of the vesc app it says “State: calibrating”. What could be the issue? I have triple checked all connections and they seem to be fine. Thanks!