touch screen - OSError: [Errno 5] EIO

Hi, the scrypt lvgl_button.py, generates the following error on line 18: ts.init(i2c)

Traceback (most recent call last):
File “”, line 18, in
OSError: [Errno 5] EIO
MicroPython v0.5.0-42-g458ed4e on 2020-04-10; Sipeed_M1 with kendryte-k210