# Blank page on safe mode **URL:** https://meta.discourse.org/t/blank-page-on-safe-mode/54433 **Category:** Bug **Created:** [17.Декабрь.2016 18:33:22 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433 "2016-12-17T18:33:22Z") **Posts on this page:** 8 **Page:** 1
### Author: ![gauthier](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/gauthier/32/59292_2.png) [@gauthier](https://meta.discourse.org/u/gauthier) #### Post date: [17.Декабрь.2016 18:33:22 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/1 "2016-12-17T18:33:22Z")
Hello, When I uncheck the 3 boxes on the [safe mode](https://meta.discourse.org/t/53504?silent=true) page and i click ok, i got a blank page. It’s useless to do this, but i don’t think it’s normal. log: NoMethodError (undefined method `index\_url’ for #SafeModeController:0x00557b44cf8f18) /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action\_dispatch/routing/polymorphic\_rout `/var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/routing/polymorphic_routes.rb:239:in `handle_string_call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/routing/url_for.rb:161:in `url_for' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/redirecting.rb:95:in `_compute_redirect_to_location' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/redirecting.rb:75:in `redirect_to' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/flash.rb:57:in `redirect_to' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/instrumentation.rb:64:in `block in redirect_to' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications.rb:164:in `block in instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications.rb:164:in `instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/instrumentation.rb:63:in `redirect_to' /var/www/discourse/app/controllers/safe_mode_controller.rb:17:in `enter' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/implicit_render.rb:4:in `send_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/abstract_controller/base.rb:198:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/rendering.rb:10:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/abstract_controller/callbacks.rb:20:in `block in process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:117:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:505:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:92:in ` __run_callbacks__' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:81:in `run_callbacks' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/abstract_controller/callbacks.rb:19:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/rescue.rb:29:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications.rb:164:in `block in instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications/instrumenter.rb:20:in `instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/notifications.rb:164:in `instrument' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/instrumentation.rb:30:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/params_wrapper.rb:250:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/railties/controller_runtime.rb:18:in `process_action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/abstract_controller/base.rb:137:in `process' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionview-4.2.7.1/lib/action_view/rendering.rb:30:in `process' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-mini-profiler-0.10.1/lib/mini_profiler/profiling_methods.rb:102:in `block in profile_method' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal.rb:196:in `dispatch' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_controller/metal.rb:237:in `block in action' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/routing/route_set.rb:74:in `dispatch' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/routing/route_set.rb:43:in `serve' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/journey/router.rb:43:in `block in serve' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/journey/router.rb:30:in `each' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/journey/router.rb:30:in `serve' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/routing/route_set.rb:817:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-protection-1.5.3/lib/rack/protection/frame_options.rb:31:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/omniauth-1.3.1/lib/omniauth/builder.rb:63:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/conditionalget.rb:38:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/head.rb:13:in `call' /var/www/discourse/lib/middleware/anonymous_cache.rb:138:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/params_parser.rb:27:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/flash.rb:260:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:225:in `context' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:220:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/cookies.rb:560:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/query_cache.rb:36:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activerecord-4.2.7.1/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:88:in ` __run_callbacks__' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:778:in `_run_call_callbacks' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/activesupport-4.2.7.1/lib/active_support/callbacks.rb:81:in `run_callbacks' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/callbacks.rb:27:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/remote_ip.rb:78:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/logster-1.2.5/lib/logster/middleware/reporter.rb:31:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/rack/logger.rb:38:in `call_app' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/rack/logger.rb:22:in `call' /var/www/discourse/config/initializers/100-quiet_logger.rb:13:in `call_with_quiet_assets' /var/www/discourse/config/initializers/100-silence_logger.rb:26:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/actionpack-4.2.7.1/lib/action_dispatch/middleware/request_id.rb:21:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/methodoverride.rb:22:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/runtime.rb:18:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-mini-profiler-0.10.1/lib/mini_profiler/profiler.rb:278:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/message_bus-2.0.2/lib/message_bus/rack/middleware.rb:62:in `call' /var/www/discourse/lib/middleware/request_tracker.rb:73:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/engine.rb:518:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/application.rb:165:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/railtie.rb:194:in `public_send' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/railties-4.2.7.1/lib/rails/railtie.rb:194:in `method_missing' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/urlmap.rb:66:in `block in call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `each' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/rack-1.6.4/lib/rack/urlmap.rb:50:in `call' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.2.0/lib/unicorn/http_server.rb:562:in `process_client' /var/www/discourse/lib/scheduler/defer.rb:85:in `process_client' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.2.0/lib/unicorn/http_server.rb:658:in `worker_loop' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.2.0/lib/unicorn/http_server.rb:508:in `spawn_missing_workers' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.2.0/lib/unicorn/http_server.rb:132:in `start' /var/www/discourse/vendor/bundle/ruby/2.3.0/gems/unicorn-5.2.0/bin/unicorn:126:in `' /var/www/discourse/vendor/bundle/ruby/2.3.0/bin/unicorn:22:in `load' /var/www/discourse/vendor/bundle/ruby/2.3.0/bin/unicorn:22:in `
'` ---
### Author: ![cpradio](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/cpradio/32/4970_2.png) [@cpradio](https://meta.discourse.org/u/cpradio) #### Post date: [17.Декабрь.2016 19:54:43 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/2 "2016-12-17T19:54:43Z")
Do you have any non-official plugins installed? ---
### Author: ![gauthier](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/gauthier/32/59292_2.png) [@gauthier](https://meta.discourse.org/u/gauthier) #### Post date: [17.Декабрь.2016 19:59:37 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/3 "2016-12-17T19:59:37Z")
yes, but it’s same problem on all discourse i think. You can try here on meta: [Discourse Meta](https://meta.discourse.org/safe-mode) ---
### Author: ![jomaxro](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/jomaxro/32/126216_2.png) [@jomaxro](https://meta.discourse.org/u/jomaxro) #### Post date: [17.Декабрь.2016 20:11:45 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/4 "2016-12-17T20:11:45Z")
> [@gauthier](#): > > When I uncheck the 3 boxes on the [safe mode](https://meta.discourse.org/t/53504?silent=true) page and i click ok, i got a blank page. I don’t see that error, I just get a HTTP 500 error. I agree there should be error checking to prevent clicking `Enter Safe Mode` with nothing checked. ---
### Author: ![gauthier](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/gauthier/32/59292_2.png) [@gauthier](https://meta.discourse.org/u/gauthier) #### Post date: [17.Декабрь.2016 20:13:32 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/5 "2016-12-17T20:13:32Z")
ok I see, error 500 on chrome, blank page on firefox 😉 ---
### Author: ![codinghorror](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/codinghorror/32/110067_2.png) [@codinghorror](https://meta.discourse.org/u/codinghorror) #### Post date: [17.Декабрь.2016 21:54:52 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/6 "2016-12-17T21:54:52Z")
We should fix this next week @sam ---
### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld) #### Post date: [19.Декабрь.2016 11:03:26 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/7 "2016-12-19T11:03:26Z")
Fixed in [https://github.com/discourse/discourse/pull/4616](https://github.com/discourse/discourse/pull/4616) ---
### Author: ![tgxworld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tgxworld/32/106117_2.png) [@tgxworld](https://meta.discourse.org/u/tgxworld) #### Post date: [19.Декабрь.2016 11:03:30 UTC](https://meta.discourse.org/t/blank-page-on-safe-mode/54433/8 "2016-12-19T11:03:30Z")