UnicodeEncodeError: 'gbk' codec can't encode character '\xbf' in position 40285: illegal multibyte sequence:

hi friends!
During my use, I compiled it last week. I came back this week and suddenly this problem occurred. I am a little confused and hope to be solved.
UnicodeEncodeError: ‘gbk’ codec can’t encode character ‘\xbf’ in position 40285: illegal multibyte sequence:
env.SConscript(“$BUILD_SCRIPT”)
File “C:.platformio\packages\tool-scons\script..\engine\SCons\Script\SConscript.py”, line 605:
return _SConscript(self.fs, *files, **subst_kw)

What’s the name of the source file you’re trying to compile? Are there any special characters in it, like russian or chinese symbols?

No, I tried to completely remove the software and reinstall it to solve the problem.