Calibration Qubo Digital Smart B+(Intéra)

Good afternoon friends! I have an Elite Intéra trainer. In the last training sessions that I performed at Zwift, the trainer began to show a very large variation in power, reaching 1200w without any force. Being impossible to pedal. It seems to be totally out of balance. Can you help me? I need to calibrate the trainer, how should I proceed? I put this message here because they say that Intéra and Qubo have the same functioning. I have already contacted Elite directly, with no response yet. Thank you