Now I go into my PHP file and make right-click on a class and chose "Find References"
use Laravel\Nova\Fields\Text;
Instead of opening a panel/window and displaying references, Atom shows a warning popup with this message:
Find References: Symbol references are not available for this project.
The only suggestion I found fixing this is by installing the ide-php package, what I already did. Restarted Atom results with same warning message displayed.
Any ideas how to get "Show References" running?
Restarting my notebook did the trick. I probably didn't restart Atom properly to make the new packages work ¯\_(ツ)_/¯
If you want to make Go to Declaration work you haver to generate symbols first: here how to.