Your copy of this database must be damaged on your system. Panorama will display this error if any of the internal files inside the database package have been removed or tampered with. Here's what the inside of a Panorama database file should look like if you use Show Package Contents.
I checked the copy on my system and it is fine. If you'd like me to look at your copy of this file, please compress it into a zip file and email it to me.
In the meantime, I have uploaded this file to the Panorama Database Exchange so you can download a fresh copy.