Troubleshooting
Error message index
Translate common iOS and signing-tool errors into the subsystem that actually failed.
Start with the exact text and numeric code. Similar-looking messages can come from different layers.
| Message or symptom | Most likely layer | First move |
|---|---|---|
| Integrity could not be verified | Signature, profile, UDID, certificate, or IPA | Run the integrity checklist |
| Unable to Verify App / Not Verified | Verification blocked, or certificate revoked | Unblock the check, then test the certificate |
| 0xe8008018 identity no longer valid | Certificate revoked, expired or mismatched | Check the certificate |
| The provisioning profile is banned | Free Apple ID team refused by Apple | Use a route that does not depend on that Apple ID |
| Unable to install or download | Manifest, HTTPS, package, storage, or eligibility | Separate transport from signing |
| Untrusted Developer | Trust not established | Open VPN & Device Management |
| Developer Mode required | Development-signed app | Tap the app once, then enable Developer Mode |
| Security Delay when installing a profile | Stolen Device Protection, away from a familiar location | Install at home, or wait out the one-hour delay |
| Install stuck, icon grey | Interrupted install or bad IPA | Force restart, delete and retry |
| App no longer available | Profile expiry, revocation, or free-signing expiry | Compare other apps and dates |
| Maximum of 3 apps | Personal Team installed-app limit | Remove or deactivate an app, or use another method |
| 3013 / maximum App IDs | Ten IDs registered in seven days | Wait; extensions may consume several IDs |
| 1007 invalid format | IPA archive not in expected form | Obtain a clean IPA from the primary source |
| AltServer could not be found | AltServer connectivity | Check computer, network, trust, firewall, and Wi-Fi sync |
| No devices detected | Apple device services, cable, trust, or pairing | Unlock, reconnect, trust, and check Finder/iTunes |
| Provision mismatch | P12/profile, App ID, or entitlement mismatch | Use the original matching pair |
| P12 password incorrect | Wrong file or wrong password type | Extract ZIP and use the P12 import password |
| Feather remains Ready | Local install server or network path | Use the Feather transport checklist |
| File picker does nothing, no Dynamic Island | Bundle ID differs from the profile's App ID | Sign with the profile's App ID |
| App opens then closes | Runtime, encrypted binary, tweak, framework, or entitlement | Use crash isolation |
| Pairing file invalid | Stale or wrong-device pairing record | Generate a fresh record while unlocked and trusted |
Error-code sources
Do not translate every failure into “revoked.” A certificate-wide failure should affect more than one fresh install using the same pair.
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