Undefined index: version in drupal_get_library()

Current Version: Drupal 7.32
note: the reason I haven't updated to 7.39 is because I get the following PHP error after attempting the update:

Interface 'DatabaseStatementInterface' not found in includes/database/prefetch.inc on line 22

However, that isn't even my current issue. I'm getting the following notice constantly in my logs.

I'm getting this notice 4 times on page load:

Notice: Undefined index: version in drupal_get_library() (line 4759 of C:\wamp\www\DesktopSite\includes\common.inc).

Not sure if it's the cause, but on my status report it shows plupload library as "not found", although it is placed in all/libraries/plupload, and the module is installed. I have tried installing both 1.5.8 and 2.1.8 libraries.

Thanks for reading!