Internal Server Error when trying to access Superset reports

It is not possible to access Superset reports on both Chrome and Firefox browsers. The response consists of the following stacktrace:

Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 2446, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1951, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.6/site-packages/flask_cors/extension.py", line 161, in wrapped_function
return cors_after_request(app.make_response(f(*args, **kwargs)))
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1820, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.6/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1949, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.6/site-packages/flask/app.py", line 1935, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/usr/local/lib/python3.6/site-packages/superset_patchup/oauth.py", line 120, in oauth_authorized
resp = self.appbuilder.sm.oauth_remotes[provider].authorized_response()
File "/usr/local/lib/python3.6/site-packages/flask_oauthlib/client.py", line 707, in authorized_response
data = self.handle_oauth2_response(args)
File "/usr/local/lib/python3.6/site-packages/flask_oauthlib/client.py", line 692, in handle_oauth2_response
type='invalid_response', data=data
flask_oauthlib.client.OAuthException: Invalid response from openlmis