Sometimes software or an app’s installation can get muddled, or the cached data gets messed up.
Before a reinstall, you can try clearing the app cache and data. Open Android Settings > Apps and look for and tap on Norton 360. Tap on Storage and then tap Clear Data. Then restart your device. You will have to log into your Norton Account to activate the app.
If that does not resolve the issue, then a reinstall is the next step.