Error: 'utf-8' codec can't decode byte 0xbf in position 79: invalid start byte

[fitmarcin]

Hi, what can be wrong with this error?
Error: 'utf-8' codec can't decode byte 0xbf in position 79: invalid start byte
I choose file .mp4, model then click run and this error occured.
Thanks in advance.

[elvisw]

I also encountered the same error