Could not find a valid mapping for path "/auth/oauth2/callback"

[hopewise]

My rails app integrated with Auth0 with no issue, however, when I upgraded omniauth-auth0 from 1.4.2 to ~> 2.0.0 it forced me to upgrade omniauth-oauth2 from 1.3.1 to ~> 1.4

then, after upgrading, I started getting this error after social login with Lock 11:

Could not find a valid mapping for path "/auth/oauth2/callback"

My code base has not been touched, I only upgraded the gems.

Full trace:

devise (4.3.0) lib/devise/mapping.rb:49:in `find_by_path!'
devise (4.3.0) lib/devise/omniauth.rb:17:in `block in <top (required)>'
omniauth (1.6.1) lib/omniauth/strategy.rb:478:in `call'
omniauth (1.6.1) lib/omniauth/strategy.rb:478:in `fail!'
omniauth-oauth2 (1.4.0) lib/omniauth/strategies/oauth2.rb:71:in `callback_phase'
omniauth (1.6.1) lib/omniauth/strategy.rb:230:in `callback_call'
omniauth (1.6.1) lib/omniauth/strategy.rb:187:in `call!'
omniauth (1.6.1) lib/omniauth/strategy.rb:167:in `call'
omniauth (1.6.1) lib/omniauth/builder.rb:63:in `call'
rack (1.6.9) lib/rack/deflater.rb:35:in `call'
warden (1.2.7) lib/warden/manager.rb:36:in `block in call'
warden (1.2.7) lib/warden/manager.rb:35:in `catch'
warden (1.2.7) lib/warden/manager.rb:35:in `call'
rack (1.6.9) lib/rack/etag.rb:24:in `call'
rack (1.6.9) lib/rack/conditionalget.rb:25:in `call'
rack (1.6.9) lib/rack/head.rb:13:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/flash.rb:260:in `call'
rack (1.6.9) lib/rack/session/abstract/id.rb:225:in `context'
rack (1.6.9) lib/rack/session/abstract/id.rb:220:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/cookies.rb:560:in `call'
activerecord (4.2.8) lib/active_record/query_cache.rb:36:in `call'
activerecord (4.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
activesupport (4.2.8) lib/active_support/callbacks.rb:88:in `__run_callbacks__'
activesupport (4.2.8) lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
activesupport (4.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks'
actionpack (4.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/reloader.rb:73:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
railties (4.2.8) lib/rails/rack/logger.rb:38:in `call_app'
railties (4.2.8) lib/rails/rack/logger.rb:20:in `block in call'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:68:in `block in tagged'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport (4.2.8) lib/active_support/tagged_logging.rb:68:in `tagged'
railties (4.2.8) lib/rails/rack/logger.rb:20:in `call'
request_store (1.3.2) lib/request_store/middleware.rb:9:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack (1.6.9) lib/rack/methodoverride.rb:22:in `call'
rack (1.6.9) lib/rack/runtime.rb:18:in `call'
activesupport (4.2.8) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack (1.6.9) lib/rack/lock.rb:17:in `call'
dragonfly (1.1.3) lib/dragonfly/cookie_monster.rb:9:in `call'
actionpack (4.2.8) lib/action_dispatch/middleware/static.rb:120:in `call'
font_assets (0.1.14) lib/font_assets/middleware.rb:17:in `block in call'
font_assets (0.1.14) lib/font_assets/middleware.rb:40:in `do_request'
font_assets (0.1.14) lib/font_assets/middleware.rb:16:in `call'
rack (1.6.9) lib/rack/sendfile.rb:113:in `call'
lib/rack/seoredirect.rb:20:in `call'
sentry-raven (2.7.1) lib/raven/integrations/rack.rb:51:in `call'
railties (4.2.8) lib/rails/engine.rb:518:in `call'
railties (4.2.8) lib/rails/application.rb:165:in `call'
railties (4.2.8) lib/rails/railtie.rb:194:in `public_send'
railties (4.2.8) lib/rails/railtie.rb:194:in `method_missing'
rack (1.6.9) lib/rack/deflater.rb:35:in `call'
rack (1.6.9) lib/rack/lock.rb:17:in `call'
rack (1.6.9) lib/rack/content_length.rb:15:in `call'
rack (1.6.9) lib/rack/handler/webrick.rb:88:in `service'
/Users/Apple/.rvm/rubies/ruby-2.2.7/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service'
/Users/Apple/.rvm/rubies/ruby-2.2.7/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run'
/Users/Apple/.rvm/rubies/ruby-2.2.7/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'

[joshcanhelp]

Callback path should be /auth/auth0/callback. Here's what I have:

# config/routes.rb

# ...
namespace 'auth' do
  scope ':provider' do
    get 'callback'
    get 'failure'
  end
end
# ...

If you're using Lock, make sure you're setting a state explicitly, as explained here.

Please re-open if you're still having this issue 👍