1. Click the 'AppValley' app that installed on your homescreen
2. Remember the 'untrusted developer' in the popup after you click the AppValley app, then click cancel.
3. Click the 'Take To Settings' button at the bottom of this, then tap the 'untrusted developer' name you remember from step 2.
4. Click the 'Trust' button, then click 'Trust' once more.