When you run ./nodebb build it should compile all the modules into/build... specifically for quickstart (and your plugin), /build/public/src/admin/plugins
@julian
this most probably is error from quickstart,
ERROR in ./build/public/scripts-admin.js
Module not found: Error: Can't resolve 'admin/modules/colorpicker' in 'C:....\Desktop\NodeBB\nodebb\build\public'
After a lot tries here and there I have reached the cause of this issue...
I cause is some plugins which are not running properly. It is due to this it hinders the compilation of client side JS for all the plugin which loads after that.