Hey, it sounds like a permissions issue. Go to your phone’s Settings > Security > Unknown Sources and enable the option to allow installations from unknown sources. After that, try installing the APK file again. If it still doesn’t work, re-download the APK from the official 1win app site to ensure it’s not corrupted. Clear your device’s cache as well—it can help resolve unexpected errors. Let me know if this works for you!

That was exactly the problem—thanks for pointing it out! After enabling the setting, the installation worked like a charm. Really appreciate your help!