Blender add-on not working

ive downloaded the zip file and added it to the my commands folder. but when i try and start the add on its showing an error. how can i fix this?
the error:
Traceback (most recent call last):
File “file:///C:\Users\Marko Stojanović\Documents\Visual Components\4.5\My Commands\Blenderer_2_3_0__2023_09_14\”, line 64, in OnStart
File “C:\Program Files\Visual Components\Visual Components Professional 4.5\Python\Lib\encodings\”, line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: ‘utf8’ codec can’t decode byte 0xe6 in position 24: invalid continuation byte