Can’t export Timelapse – ProCam 8 - Pro Camera Review

So, I recently purchased this app with the intent of recording 4K timelapses. Then, stupidly, I decided to purchase the 4K Max option for an addition price. So I leave my phone outside, taking a picture every 5 seconds, for about 45 minutes. This would equate to around a 9 minute video at 4K 60fps, which would be a few GB of storage. I currently have nearly 20 GB of storage, so there should be no issue. Then I go to export the timelapse to my camera roll, and a loading circle flashes for half a second, and then nothing else happens. I can’t even export the video, so this was a waste of $10. Edit: I still don’t feel like the normal 4K option does anything except for upscaling. I took two similar timelapses using the native camera and ProCam, and the native app did a much better job with the quality. The “4k” timelapse had a terrible amount of noise. Also, when I exported my 4K Max timelapse had terrible quality when I transferred it to my Mac. It looked worse than 720p. Any tips for fixing that? It’s possible that I just don’t understand your app interface, so I’ll keep trying to figure it out.
Review by RLY!! DON'T on ProCam 8 - Pro Camera.