Welcome to the forum.
First, a few questions please:
What version of PrE are you using?
What OS version are you running?
When you get your error message, what exactly are you doing?
You state "generic error," but are there any details at all, that you can share with us?
Do you have the latest version of Apple's QuickTime Player installed?
With the answers to those questions, we will have a starting point.
Thanks for that info, and good luck,
Note: on the forum page, there will be a Translate, which should do a better job with my Reply, than if I tried to rely on my poor Spanish.