This is common with third-party APKs. It usually means the app is not compatible with your Android version, or you already have a version of that app installed on your phone. Uninstall the previous version and try again.
Claims of apps like Messenger++ that supposedly unlock the ability to read others' messages. Risks and Safety Considerations azcode.net apk
Below I cover what these APKs are, risks, how to evaluate them, how to safely test them if you choose to, alternatives, and actionable steps to protect your device and data. This is common with third-party APKs