The MC module is malfunctioning, and the root cause could be:
When this issue happens, all operations related to MC will malfunction, such as:
Check the communication between AP and MC and check if MC board works well.
https://wiki.bambulab.com/en/x1/maintenance/replace-mc-board
https://wiki.bambulab.com/en/x1/maintenance/replace-ap-board
https://wiki.bambulab.com/en/p1/maintenance/mc-board
https://wiki.bambulab.com/en/p1/maintenance/mc-ap-cable
HMS_0500_0300_0001_0001: The MC module is malfunctioning. Please restart the device.
0500-0300-0001-0001