| Problem | Cause | Solution | |---------|-------|----------| | App crashes immediately on launch | Broken code signature | Re-sign properly with valid certificate | | “Invalid IPA” error during sideloading | Incorrect folder structure | Ensure exact path: Payload/YourApp.app | | Images don’t change | Icons stored in Assets.car | Use Asset Catalog Tinkerer | | Plist edit doesn’t take effect | App reads from UserDefaults instead | That edit requires binary hooking | | App installs but shows “Unavailable” | Missing or expired provisioning profile | Generate new profile via Apple Developer | | Size increased dramatically | Extracted then recompressed badly | Use zip -r -9 on macOS terminal |