Cannot share Imovie to any media, i.e. youtube, etc.

After creating a backup imovie library and moving my projects to the backup library I am unable to share my imovie project to any outlet, youtube, facebook or create a file after I backed up my original imovie library. I did not have this problem prior to creating a backup library. Anyone have any suggestions? Thank you in advance.

I am on a Imac using vers 10.11.3 El Capitan. I have tried restarting imovie.

Mike