Ensure the filename contains armeabi-v7a . Avoid arm64-v8a or x86 as they won't work on your specific hardware.
Explain how to to confirm you need v7a . Troubleshoot "App not installed" errors. Download Librera build 4890 armeabi v7a apk
Tap the link and wait for the "File may be harmful" warning to appear. Tap Download anyway . Ensure the filename contains armeabi-v7a