I have Vita3K installed properly with a bunch of games in the "ux0" folder. All have been left alone, so they should match perfectly with games. However, when I follow ETA Prime's tutorial for the 13.16 release, it doesn't import any of the ROMs. Vita3k is added to my emulators list just fine, but even with automatic ROM importing on, the ROMs never actually import. Is there something I'm doing incorrectly? What exactly was fixed in 13.19 to make Vita imports work again? What was broken before? I'd love to have my Vita games in LB, even if it means using some workaround method, but everything I find online doesn't work.

Yeah, I think this is the cause. I have a full path in mine that isn't in yours and it's causing issue in the code. A work around for now is to open the yml file and in the "pref-path" entry put the full path to the folder the emulator is located in. Save the file and then try to import again in LB. Alternatively you can rename/move that file out of that directory, run the import and put it back. I've noted the problem location in code and it should be corrected in the next beta release.

Despite following this entire topic I am still unable to import my Vita ROMs into LB. I tried basically everything that was mentioned here and yet still no success.