Triggers not working

I am building a course and need to add some triggers for review only. I insert a "button" and apply a trigger the screen locks up and then nothing.  I have to hit the escape button to get out of it.  I wasn't having any issues before. I loaded some triggers to hide certain items, "call outs, arrows and such", but my project is still in the preview stage.  So I do not have anything running on the timeline. I have saved, gotten out of the project and re-opened it.  Still no luck.  I tried to see if there was an updated I may have missed, but did not see anything.  All I want to do is add a trigger for the reviewer to move to the next layer when the button is clicked.