I maintain a site that is currrently on 3.6. Investigating some quirks in the cms functionality I have noticed there are a lot of 404s on assets in the /admin area. Some icons are missing and things like the Link dialog are not fully functional.
I’ve tried rolling it back a few commits, comparing the htaccess to a fresh ss3 install. What might have gone wrong here? 3.6, php 7.1. Running LAMP on OSX locally and LAMP on Linux for staging, errors are the same on each.