Error code

Android INSTALL_PARSE_FAILED_NO_CERTIFICATES

ANDROIDINSTALL_PARSE_FAILED_NO_CERTIFICATES
Android Error Code· An error code shown by Android or the Google Play Store.

What it means

The APK cannot be parsed because it contains no valid signing certificate.

How to fix it

  1. Sign the APK with a valid keystore before distributing it.
  2. Re-download the APK from the official source as the copy may be corrupt.
  3. Developers should use Android Studio Build > Generate Signed Bundle/APK to produce a correctly signed APK.

Not affiliated with Android. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.