iOS Musescore App not supporting scores made (or exported) on Musescore 4

Whenever I created and/or export a score from Musescore 4, it doesn't work with the iOS Musescore app. It just shows a blank screen, and the buttons don't work. However, if I create and/or export on Musescore 3, it works just fine. And this is only the app because the website works just fine. I've deleted the app and put it back on, shut off my device and turned it back on, I even reposted the score multiple times to make sure this wasn't a bug. This issue has prevented me from seeing/listening to 2 of my scores (which both were exported on Musescore 4). This definitely needs to be fixed.