I am receiving this same error after updating to 2.1 this morning. I checked the library files and only some of my movies and music are showing up and none of the tv shows. I would like to find a resolution to this as well.
We’ve released a minor update today that has a few fixes aimed at resolving a few file-specific issues that have been reported to cause problems during library scanning.
Can you try updating to see if this new version changes anything for you?