Please try the following:
1. Change the apps permissions: find the icon on your screen, long-press it and go to App Info> Permissions> Location> Allow only while using the app.
2. If a third-party protection software and other similar programs are installed on your phone, open the software to check if the third party is blocking or disabling permissions.
3. Clear the program data or uninstall and reinstall it.
4. Change the position and try to locate again.
If the issue persists, contact the Nothing Support Team for further assistance.