I am getting 504 gateway timeout errors trying to view my Ruby on Rails app. It used to work perfectly. Link: http://peach-bristle-aries.glitch.me/.
I remixed a copy and notice the project was giving a “Server is already running” error. To fix this, run
rm -rf tmp/pids. This sort of gets the project to work. The log then shows that a 500 error is thrown on start.
127.0.0.1 - - [16/Dec/2020:14:42:53 UTC] "GET / HTTP/1.1" 500 59978
After some research on SO, you need to add this to your config/development.rb file:
config.web_console.whitelisted_ips = '0.0.0.0/0' // whatever IP you want to whitelist
It fixed the error in the logs but I still get 504 errors.