# שגיאות 500 תכופות מאוד לאחר התקנה מחדש של השרת **URL:** \ **Category:** Product Support\ **Created:** [12 במרץ,‏ 2021,‏ 7:06pm UTC](https://meta.discourse.org/t/very-frequent-500-errors-after-server-reinstallation/183049 "2021-03-12T19:06:30Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![SilviaB](https://avatars.discourse-cdn.com/v4/letter/s/cdc98d/32.png) [@SilviaB](https://meta.discourse.org/u/SilviaB)\ **Post date:** [12 במרץ,‏ 2021,‏ 7:06pm UTC](https://meta.discourse.org/t/very-frequent-500-errors-after-server-reinstallation/183049/1 "2021-03-12T19:06:30Z")
Hello everyone, I had to rebuild a Discourse server only from the backup file after having lost the initial server and its snapshots (in a fire on the hosting site, God bless backups off-site!). The initial server was on Ubuntu 19.04 and not with the latest version of Discourse on it (maybe a couple of months behind, I do not recall the exact version). I have now installed the newest version of Discourse on an Ubuntu 18.04 and had restored the database from the UI using the last backup file. The site is now experiencing frequent 500 errors and I see two types of error messages in the production log. Could you please help me with some ideas of what I could do next? Many thanks! Started GET “/t/en-2019-des-frontaliers-imposes-a-la-source-en-france/8675” for xx.xx.xx.xx at 2021-03-12 07:57:02 +0000 Processing by TopicsController#show as HTML Parameters: {“slug”=\>“en-2019-des-frontaliers-imposes-a-la-source-en-france”, “topic\_id”=\>“8675”} Completed 500 Internal Server Error in 145ms (ActiveRecord: 0.0ms | Allocations: 30586) NoMethodError (undefined method `slow_mode_seconds' for #) (eval):2:in `slow\_mode\_seconds’ (eval):33:in `_fast_attributes' app/controllers/topics_controller.rb:1109:in `block (2 levels) in perform\_show\_response’ app/controllers/topics\_controller.rb:1104:in `perform_show_response' app/controllers/topics_controller.rb:162:in `show’ app/controllers/application\_controller.rb:358:in `block in with_resolved_locale' app/controllers/application_controller.rb:358:in `with\_resolved\_locale’ lib/middleware/omniauth\_bypass\_middleware.rb:68:in `call' lib/content_security_policy/middleware.rb:12:in `call’ lib/middleware/anonymous\_cache.rb:353:in `call' config/initializers/100-quiet_logger.rb:23:in `call’ config/initializers/100-silence\_logger.rb:31:in `call' lib/middleware/enforce_hostname.rb:23:in `call’ lib/middleware/request\_tracker.rb:177:in `call’ Started GET “/” for xx.xx.xx.xx at 2021-03-12 07:55:24 +0000 Processing by CategoriesController#index as HTML Completed 500 Internal Server Error in 313ms (ActiveRecord: 0.0ms | Allocations: 69745) NoMethodError (undefined method `default_list_filter' for # Did you mean? default_view) (eval):29:in `\_fast\_attributes’ lib/freedom\_patches/ams\_include\_without\_root.rb:57:in `include!' app/controllers/categories_controller.rb:42:in `block (2 levels) in index’ app/controllers/categories\_controller.rb:40:in `index' app/controllers/application_controller.rb:358:in `block in with\_resolved\_locale’ app/controllers/application\_controller.rb:358:in `with_resolved_locale' lib/middleware/omniauth_bypass_middleware.rb:68:in `call’ lib/content\_security\_policy/middleware.rb:12:in `call' lib/middleware/anonymous_cache.rb:353:in `call’ config/initializers/100-quiet\_logger.rb:23:in `call' config/initializers/100-silence_logger.rb:31:in `call’ lib/middleware/enforce\_hostname.rb:23:in `call' lib/middleware/request_tracker.rb:177:in `call’ --- _[View the full topic](https://meta.discourse.org/t/very-frequent-500-errors-after-server-reinstallation/183049)._