@JSkalski
You most likely will need to reinstall the application from the Windows Store. Let me know if that helps you.
@heath544
Just installed Gospel Library on a new Win10 system and I am still seeing this error. Version is 2.16.7.300
Try reinstalling the application. It should not be throwing this error, especially not on the non-beta version of the app. Also try installing the beta if you haven't already.
Performance is also really problematic. There are 30 second periods of unresponsiveness after downloading each new piece of content in the library.
This is very uncharacteristic of the application on desktops, laptops, or tablets. (Some much older, low-end phones like the Lumia 520 do have this problem, however, as their hardware is just barely good enough to even run the application.) Those thirty seconds are most likely the app indexing the new content so that it can be searched, but unless the app is running off an extremely slow (read: failing) hard drive, there's no reason for it to cause the application to hang like that. Even on my lowly 2gb RAM Surface 3, performance is smooth.