UnicodeDecodeError: 'utf-8' codec can't decode byte 0x86 in position 8: invalid start byte

[larry]

M5Stack Core2 ESP32 IoT Development kit can't get the second blinky-hello-world program run, the error as following:

Please help or let me know how to resolve it.
Thank you so much.

[rashedtalukder]

Seems like the message coming from the device over the serial port is malformed for some reason. Have you tried switching to a different cable?