Seafile-cli on raspbian can't connect to server (HTTP error 403: Forbidden)

Hello, I’m having trouble getting seafile to work correctly on my Raspian stretch server. I tried both compiling and installing via backports and both times it works and initializes correctly, but when I try to run a command that connects to my server (which works on both windows computers and my android) it throws up an error.

Here’s the error in question.

seaf-cli download-by-name -L lib -s http://<url> -d test -u <email> -p <password>
Traceback (most recent call last):
  File "/usr/bin/seaf-cli", line 866, in <module>
  File "/usr/bin/seaf-cli", line 862, in main
  File "/usr/bin/seaf-cli", line 513, in seaf_download_by_name
    token = get_token(url, username, password, tfa, conf_dir)
  File "/usr/bin/seaf-cli", line 277, in get_token
    token_json = urlopen("%s/api2/auth-token/" % url, data=data, headers=headers)
  File "/usr/bin/seaf-cli", line 210, in urlopen
    resp = urllib2.urlopen(req)
  File "/usr/lib/python2.7/", line 154, in urlopen
    return, data, timeout)
  File "/usr/lib/python2.7/", line 435, in open
    response = meth(req, response)
  File "/usr/lib/python2.7/", line 548, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib/python2.7/", line 473, in error
    return self._call_chain(*args)
  File "/usr/lib/python2.7/", line 407, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.7/", line 556, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 403: Forbidden

I want to sync files from this pi to my central seahub server (which is ironically, another pi) so I can access its files online and sync to my other computers, but since it fails on connection even when I try reading the remote libraries I can’t. Is there any solution for this? Many thanks in advance, and I’m sorry if this has an obvious solution.