If you ever get an error message when trying to connect your phone to your SL2 or SL3 camera, you need to check the permissions in the phone settings. 

  1. Go to Settings on your iPhone.

  2. Scroll down the menu and click on Exposio

  3. Check if Local Network is checked. 

  4. You can also make sure that all permissions are checked. 

You can try to connect your camera again.