I get this error when clicking on my heroku staging environment.
Other related questions are talking about linking the multi-json update or linking the update or removing Gemfile.lock and installing the package (which are all the same). None of these solutions helped me.
my gemfile does not call multi-json I tried to specify the multi-json version but always faced the same problem when deploying to heroku. My development environment works great.
I also upgraded bundler to 1.3.6 and tried again
Running: bundle install
fatal: Not a git repository (or any of the parent directories): .git
fatal: Not a git repository (or any of the parent directories): .git
fatal: Not a git repository (or any of the parent directories): .git
Some gems seem to be missing from your vendor/cache directory.
Could not find multi_json-1.7.2 in any of the sources
!
! Failed to install gems via Bundler.
!
! Heroku push rejected, failed to compile Ruby/rails app
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