ImportError: cannot import name JSONDecodeError

[nasimulhasan]

When I run bacend.py, the error occurs

Traceback (most recent call last):
File "backend.py", line 3, in
from json import JSONDecodeError
ImportError: cannot import name JSONDecodeError

[Phype]

First, i'm not working on this project. You could try to remove the import line and replace JSONDecodeError with ValueError, this should work according to this question. If it works, tell me and i'll commit a patch (or submit a PR).