Hello, The first time I built the app in the App Center, the apk file created was successfully installed on Android 8.1.0. However, after I changed to release variant and enabled the "Sign builds" option, the created apk cannot be installed and the system just showed me the error message "App not installed". Does anyone know what might be happening? Regards, Vinícius Alves – Siemens
Android doesn’t like installing a new build of the same app if the version number hasn’t been incremented. Try deleting the old app from your phone and then re-installing. Then in the future, be sure to increment the version number for each new build.
If that doesn’t work, then there might be something wrong with your signing key.
I deleted the old app and disabled the signature, but still the app cannot be installed.