Need assistance!!!

Downloaded an app to play music however received suspicious the second I opened app it confirmed add additionally tried to uninstall the app afterwards however the settings simply crashes if I attempt to and a "package deal installer" retains stopping it and it's apparently my machine's in-built installer. Additionally there's no settings no signal ins nothing simply says enable for permission however I received suspicious can also't uninstall. The app I downloaded from play retailer and it has fairly certain purchased critiques it's 4.6!! How tf.