sublime-wakatime: Silently failed to send my statistics for a week

I haven’t visited dashboard for a week or so. And just today I’ve found out that it is empty.

Statusbar shows that WakaTime OK. Sessions table in .wakatime.db is empty. Though heartbeats table is not.

WakaTime log contains the same repeating error for week:

{
  "now": "2019/04/30 14:01:39 +0300",
  "version": "10.8.2",
  "plugin": "sublime/3208 sublime-wakatime/8.3.4",
  "time": 1556622067.50238,
  "caller": "/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/api.py",
  "lineno": 140,
  "file": "/Users/***/Library/Application Support/Sublime Text 3/Packages/User/WakaTime.sublime-settings",
  "level": "WARNING",
  "message": "{'IOError': u'Could not find a suitable TLS CA certificate bundle, invalid path: /Users/***/Applications/NextGIS/Library/Frameworks/openssl.framework/Resources/ssl/certs/cert.pem', 'traceback': 'Traceback (most recent call last):\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/api.py\", line 111, in send_heartbeats\
verify=ssl_verify)\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/packages/requests/sessions.py\", line 555, in post\
return self.request(\\'POST\\', url, data=data, json=json, **kwargs)\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/packages/requests/sessions.py\", line 508, in request\
resp = self.send(prep, **send_kwargs)\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/packages/requests/sessions.py\", line 618, in send\
r = adapter.send(request, **kwargs)\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/packages/requests/adapters.py\", line 407, in send\
self.cert_verify(conn, request.url, verify, cert)\\n  File \"/Users/***/Library/Application Support/Sublime Text 3/Packages/WakaTime/packages/wakatime/packages/requests/adapters.py\", line 226, in cert_verify\
\"invalid path: {0}\".format(cert_loc))\\nIOError: Could not find a suitable TLS CA certificate bundle, invalid path: /Users/***/Applications/NextGIS/Library/Frameworks/openssl.framework/Resources/ssl/certs/cert.pem\\n'}"
}

I can trace the reason: I deleted Next GIS just around this time. I have no idea why a certificate from the innards of Next GIS was used by WakaTime, but I guess it has something to do with the configuration of my machine.

Why WakaTime was OK all this time? And how do I fix this?