Problem with reading symbol (division and multiplication sign) from csv or excel file

I have developed a Math task in Psychopy and for that I created some math problems with division and multiplication. Unfortunately each time I am running the experiment psychopy can’t read the multiplication and division sign from csv file. It is showing unicode error:
UnicodeDecodeError: ‘utf-8’ codec can’t decode byte 0xd7 in position 0: unexpected end of data
Can anyone suggest what can be done??
P.S. I also need to create an online version of this experiment. So would this also create a problem in JS as well???

I found an indirect way of solving this problem. I rewrite the main psychopy script (C:\Program Files\PsychoPy3\Lib\site-packages\psychopy\data\ as below-

#trialsArr = pd.read_csv(fileName, encoding=‘utf-8-sig’)
trialsArr = pd.read_csv(fileName, encoding=‘unicode_escape’)