3utools Installation Package Validation Failed Page

: If you are using your Apple ID to sign the app, ensure Two-Factor Authentication is handled correctly. Sometimes the validation fails because the login session has expired.

Delete the current download in 3uTools, restart the program, and try the download again to ensure the file isn't corrupted. Use Sideloadly as an Alternative: Many users find that Sideloadly 3utools installation package validation failed