Migrating apps can be a real headache, huh? I feel your pain. I once had a similar struggle when trying to switch frameworks. It sounds like you've really thrown the kitchen sink at this problem. Have you double-checked that all the dependencies for Expo SecureStore are properly installed? Maybe it's a version compatibility issue. Also, did you try looking at the Expo logs in more detail? That might give a clue about what's going wrong deeper down. Any luck yet?