Sorry to hear the problem.
I'd like to ask some question so that I can try to repeat your problem here.
Q1) What is OS version and app versions (CH and AME version)?
Q2) What did the error message say? Can you take a screenshot of this error and post here?
Q3) Can you launch AME from Finder/Desktop?
Q4) And can you try to export to AME from CH, while AME is running?
Thank you.