If Android blocks installation, approve installs from your browser or file manager when the system prompt appears, then reopen the APK.
If the installer opens but does not finish, confirm you have enough free storage and remove older conflicting test builds before retrying.
- Retry the download on a stable connection if the APK file looks incomplete or Android reports that it cannot open the package.
- Use the version shown on the download page or releases page to make sure you are testing the expected build.