I was having a big time configuring and adding plugins to a new 5.0 installation and then discovered that when I clicked on the “Add a Topic” button nothing happened.
I disabled all the other WordPress plugins, changed the theme back to WP 2011 and even uploaded fresh SP files. But still no fix. I then discovered it was the SP File Upload plugin that was causing the trouble. When i disabled it, I could start topics again.
Made a little screencast of this: http://www.screencast.com/t/Hj3AuNJIrxz