SecurityException: Failed to find provider null for user 0; on ActiveAndroid on Android 8.0

As pointed out by @GeigerGeek security changes on Android 26 and above require you to specify the content provider in your manifest. For ActiveAndroid you can add the below to your Manifest and change your package name. <provider android:name=”com.activeandroid.content.ContentProvider” android:authorities=”<your.package.name>” android:enabled=”true” android:exported=”false”> </provider> If using flavours on your build process you can use below instead: … Read more