💡 If you actually bought the app and nothing works, email the developers at envy_four@yahoo.com with your Play Store GPA Order Number . They are known for manually whitelisting users who face persistent bugs. To help you get back to customizing, could you tell me: What One UI version (e.g., 5.1, 6.0) are you running? Did this happen immediately after an update ? Are you using the official Play Store version ?
Note: Remember to turn this back on once your theme is applied for device safety.