Error E204 – What should I do?

Please follow the steps below:
1️⃣ Place the mower on a level surface
2️⃣ Reinstall the mower’s upper shell, then restart the device
Video reference:https://www.youtube.com/watch?v=Cnd3MLoF3Lk
If the problem persists, please contact support@anthbot.com and provide:
● Device serial number (SN)
● Screenshot or photo showing the error in the APP
● The exact date and time the issue occurred
● Steps you have already tried