"Error during accelerometer data streaming" in Realtime Analysis Tool

Hello,
I updated my V-Core 3.1 to RatOS 2.1 and i wanted to test the Analysis Tool but I only get the error

Error during accelerometer data streaming
uncaught exception: [object Event]

Error during accelerometer data streaming
uncaught exception: [object Event]

Error during accelerometer data streaming
uncaught exception: [object Event]

Error during accelerometer data streaming
uncaught exception: [object Event]

If I set under Tools -> Toolhead Oscillator the oscillation direction and a frequency. The printer vibrates for ca 1s but same error