rails server bin/rails:6: warning: already initialized constant APP_PATH error

Question

I\'ve tried a number of things like uninstalling/reinstalling rails and gems but to no avail.

When I go into my new project and run rails s or bundle exec rails serv

Answer 1

I got this error by trying to update rails 4 and imagemagick and rmagick. So I just ran

gem uninstall rmagick

Select the All Versions option. Then try again

EDIT: This happaned again with me just now because I tried to use a gem without installing the required base gem. In my case the solution was to install 'omniauth-google' before trying to use 'omniauth-google-oauth2', but because I didn't install I got the same error again