Troubleshooting Missing CSS/JS in the Control Panel
You’re trying to install Craft for the first time and you notice that no CSS or JS is being loaded in the installer. Or maybe you view your browser’s inspector and the response to the CSS/JS files are all garbled.
Even if you’re not getting garbled CSS/JS in the response, you might see this error as in your browser or in the response for the CSS/JS:
Failed to delete buffer zlib output compression
The fix for that error is the same.
Note that you will probably have to restart your web server for any changes to the php.ini file to take affect.