rack-flash | using Sinatra , you should use sinatra

First thing I should mention is that I'm NOT using Rails. I don't have a rake assets:precompile task (tried it anyway, didn't work). I don't have a public/assets folder either (tried git rm -r public/assets anyway, also didn't work).

For a long time, I was using Dropbox to deploy to Heroku (I'm quite the newbie to code) - I was planning on moving to git in about a month or so. But given this issue, I made the move today and tried pushing through git - also didn't work. i.e. I did a git pull, settled all the conflicts and then did git push. Still nothing.

Basically, Heroku isn't loading any of my new CSS and JS. It detects the files just fine. Running git push now says everything is up-to-date, running git status says there is nothing to commit. But using Chrome's inspect tool, the JS and CSS files don't have the new code I wrote.

I also tried adding the gem rack-flash-session to my Gemfile and requiring 'rack/flash/test' in my application_controller - this actually crashed the whole app and I removed it.

I also tried installing the heroku-repo plugin and running heroku repo:purge_cache --app my-app-name but that also didn't work

Running the code locally, everything works fine. It's just the online version that's failing.

I updated the Heroku CLI just before trying any of this and (you guessed it!), also didn't work.

I don't know what other info you'd need, so let me know in the comments and I'll be happy to provide them :)

Any help is appreciated!