Hi! You must disable Smart App Control to install the app. Microsoft does not provide ways to bypass Smart App Control protection for individual applications. It recommends that you contact the app developer and encourage them to sign the app with a valid subscription.
- Expand How can I tell Smart App Control to let this one specific app through?
To disable Smart App Control, open Windows Settings > Privacy & Security > Windows Security > Apps & Browser control > Smart App Control > Off.
WARNING: You cannot enable Smart App Control after uninstalling it. To enable it again, you need to reinstall Windows. Don't worry, Windows Defender will continue to function.