Error fetching sequences: OSC API error: User not logged in! when loading tracks

[stormsnsnow]

Short Information

• Used Toolkit version: 1.0.4
• Operating System: Windows

Problem Definition Briefly (might be explained in steps)

• When viewing tracks, it says this message
• Error fetching sequences: OSC API error: User not logged in!

Expected Output

• Show tracks from KartaView

Actual Output

• No data available. Press the button below to fetch the sequences.
  Error fetching sequences: OSC API error: User not logged in!

Extra information (can contain screen shots)

[chrisdebian]

Hi,

The error OSC API error: User not logged in! means MapSyncer is unable to authenticate with the KartaView API. This usually happens when you haven't signed in to KartaView within MapSyncer, or your session has expired.

Could you check whether you're logged in? In MapSyncer, go to Settings → Account (or similar) and confirm that your KartaView credentials are saved and active. If you've recently changed your password or the session has timed out, signing out and back in should clear it.

If you are logged in and still seeing this error, please let us know the exact steps to reproduce it and we can dig further.

Thanks, Chris

[stormsnsnow]

[2026-06-11 11:14:49,285] ERROR in app: Exception on /authenticate/ [GET]
Traceback (most recent call last):
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connectionpool.py", line 788, in urlopen
response = self._make_request(
^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connectionpool.py", line 534, in _make_request
response = conn.getresponse()
^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connection.py", line 571, in getresponse
httplib_response = super().getresponse()
^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\http\client.py", line 1395, in getresponse
response.begin()
File "C:\Program Files\Python311\Lib\http\client.py", line 325, in begin
version, status, reason = self._read_status()
^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\http\client.py", line 294, in _read_status
raise RemoteDisconnected("Remote end closed connection without"
http.client.RemoteDisconnected: Remote end closed connection without response

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Program Files\Python311\Lib\site-packages\requests\adapters.py", line 696, in send
resp = conn.urlopen(
^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connectionpool.py", line 842, in urlopen
retries = retries.increment(
^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\util\retry.py", line 498, in increment
raise reraise(type(error), error, _stacktrace)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\util\util.py", line 38, in reraise
raise value.with_traceback(tb)
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connectionpool.py", line 788, in urlopen
response = self._make_request(
^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connectionpool.py", line 534, in _make_request
response = conn.getresponse()
^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\urllib3\connection.py", line 571, in getresponse
httplib_response = super().getresponse()
^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\http\client.py", line 1395, in getresponse
response.begin()
File "C:\Program Files\Python311\Lib\http\client.py", line 325, in begin
version, status, reason = self._read_status()
^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\http\client.py", line 294, in _read_status
raise RemoteDisconnected("Remote end closed connection without"
urllib3.exceptions.ProtocolError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Program Files\Python311\Lib\site-packages\flask\app.py", line 1511, in wsgi_app
response = self.full_dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\flask\app.py", line 919, in full_dispatch_request
rv = self.handle_user_exception(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\flask\app.py", line 917, in full_dispatch_request
rv = self.dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\flask\app.py", line 902, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\MapSyncer\app.py", line 101, in callback
access_token = osm_auth.callback(request.url)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\osm_login_python\core.py", line 126, in callback
resp = self.oauth.get(user_api_url)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\requests\sessions.py", line 671, in get
return self.request("GET", url, params=params, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\requests_oauthlib\oauth2_session.py", line 566, in request
return super(OAuth2Session, self).request(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\requests\sessions.py", line 651, in request
resp = self.send(prep, **send_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\requests\sessions.py", line 784, in send
r = adapter.send(request, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Program Files\Python311\Lib\site-packages\requests\adapters.py", line 711, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))
127.0.0.1 - - [11/Jun/2026 11:14:49] "GET /authenticate/?code=EyFqK_V64_yklqYLYEiGunBa240Tv2EZCXVECY-O8gg&state=qytIWGoR557bjAljbUJ7TKEggP4xcx HTTP/1.1" 500 -
127.0.0.1 - - [11/Jun/2026 11:14:49] "GET /favicon.ico HTTP/1.1" 404 -

[stormsnsnow]

Sadly, no result @chrisdebian. No settings option
No data available. Press the button below to fetch the sequences.
Error fetching sequences: OSC API error: User not logged in!