Hi, when I try to open the Norton Mobile App on my Samsung Tablet, it comes with the following message, "Unfortunately, Norton Mobile has Stopped". I tried restarting and reactivating, but still no luck. When I go into Application Manager everything is greyed out for the NMS. My version is 4.4.0.4302, has been working all year, seem to have stopped a few days ago.
Just a shot in the dark here. I see you seem to be using a non default font on the device. Try setting the font back to default, restart the device and see if that stops the issue.
If that does not help, submitting logs to Norton would be my next suggestion. Open the NMS app and tap the three bars at the top left. Tap on App Settings, and scroll down to the Logging section. Turn on Enable Debug Log. Then continue using your device until your issue happens again. After the issue has happened, go back to the Debug Log setting and turn it off, then tap on Send Error Report with log files. In your submission include your forum user name and a link to this thread.
Let me know if you do submit logs and I'll let my contacts know to look for them.
I managed to clear the cache and data as per your instruction but still would not work. I then retried and also managed to uninstall and download the app again, reinstalled, turn the device administrator on but still the same message.
Try going into the Norton Mobile Security, NMS app settings. Tap on the 3 bars at the top left of the NMS screen and tap on Settings. Scroll down to the Anti Theft section and turn off the Device Administrator setting. Now go to Android Settings - Apps. Scroll to the NMS app and clear the app cache and app Data. Restart the device and turn the Device Administrator setting back on. This will reset your NMS to a trial version. To get the full version back, open the NMS app, tap on the 3 bars at the top left, then tap Sign In. Enter your Norton Account information and you should have the full version again.