Hi all. I have had Prey on several devices over time and it has always worked flawlessly. I recently repaired a broken phone, which had Prey on it before. The device's software was completely refreshed to create a clean slate. It was also removed from the Prey panel as a device. Now after reinstalling all apps, Prey included, it, Prey, opens to a black screen only. I've installed, uninstalled, reinstalled, cleared cache, activated and deactivated device administrator settings. The app shows as installed on my Play store. The phone is a Umi Touch, Android 6. As mentioned, it used to work on the phone before. Any ideas what else could be wrong please? Thanks in advance.