Error 422 is popular in the community as a "lost and scariest version" of Minecraft. It is frequently distributed as a modified, corrupted, or "hacked" version of the game.
If none of the above works, the Play Store itself might be bugged. You can bypass it by sideloading the Minecraft APK from a trusted mirror like APKMirror (owned by the same company as Android Police). download minecraft error 422 android fix fix
Ensure the file matches your device (32-bit vs. 64-bit). Error 422 is popular in the community as