The 'Unable to Install – App Integrity Could Not Be Verified' error usually appears when the IPA file is corrupted during download, or the developer certificate has expired. The fix is to delete the downloaded file, clear your Safari cache, and re-download using a stable internet connection. If the issue persists, try using a VPN as some ISPs block gaming app downloads.
For certificate expired errors, you need to re-download 918Kiss from the official site as the developer will have issued a new certificate. For app crash errors, make sure your iPhone has enough free storage (at least 200MB recommended) and that your iOS is updated to a supported version.
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