error finding username by userID

[Mickept]

python3 InstaTracker.py -i 47682547574
Traceback (most recent call last):
File "/home/ndf10/InstaTrack/InstaTracker.py", line 136, in
main()
File "/home/ndf10/InstaTrack/InstaTracker.py", line 119, in main
username = useridToUsername(args.id)
File "/home/ndf10/InstaTrack/InstaTracker.py", line 63, in useridToUsername
j = json.loads(r.text)
File "/usr/lib/python3.9/json/init.py", line 346, in loads
return _default_decoder.decode(s)
File "/usr/lib/python3.9/json/decoder.py", line 337, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "/usr/lib/python3.9/json/decoder.py", line 355, in raw_decode
raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)