ssrf.py doesn't work

[MR-pentestGuy]

Traceback (most recent call last):
File "ssrf.py", line 37, in main
request = requests.get(
File "/home/sanath/.local/lib/python3.8/site-packages/requests/api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "/home/sanath/.local/lib/python3.8/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/home/sanath/.local/lib/python3.8/site-packages/requests/sessions.py", line 528, in request
prep = self.prepare_request(req)
File "/home/sanath/.local/lib/python3.8/site-packages/requests/sessions.py", line 456, in prepare_request
p.prepare(
File "/home/sanath/.local/lib/python3.8/site-packages/requests/models.py", line 316, in prepare
self.prepare_url(url, params)
File "/home/sanath/.local/lib/python3.8/site-packages/requests/models.py", line 390, in prepare_url
raise MissingSchema(error)
requests.exceptions.MissingSchema: Invalid URL '': No schema supplied. Perhaps you meant http://?

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "ssrf.py", line 58, in
main(url,sys.argv[2])
File "ssrf.py", line 46, in main
print('[ERROR] '+err)
TypeError: can only concatenate str (not "MissingSchema") to str

how i used it
python3 ssrf.py urls.txt burpcolllab

[m4ll0k]

Hi,

Show me full command.

[MR-pentestGuy]

python3 ssrf.py urls.txt burpcolllab
hey i used endpoints instead of alivesubs
looks like it doesn't work on endpoints
and also if the alivesubs are greater than 1000 it breaks up