Repeated Crash during Tutorial "Learn the Basics" Adding a Blur Effect
I am a complete newbie to After Effects... So I'm doing the tutorials. Didn't get very far before hitting this problem that I cannot seem to get past.
In the "Add a Visual Effect" tutorial, #4 of 5 in "Learn the Basics," I have been following the steps exactly, but the same thing is happening every time in step 2/8: After I add the Fast Box Blur effect to the Summer_Forest.mp4 layer, then change the Blur Radius property to 25 in the effect settings, hitting the tutorial window's "NEXT" button immediately crashes the app, which displays the following error messages in two consecutive pop-up alerts as it dies:
"After Effect error: internal verification failure, sorry! {no current context}"
"After Effects can't continue: very unexpected uncaught exception while application running"

What am I supposed to do here? "Very unexpected," indeed.
