A. Ensure that you are entering the coupon code exactly as it appears, including any uppercase letters or special characters. Double-check the expiration date of the coupon to confirm it is still valid.

B. If the coupon code fails, try clearing the app's cache. Go to your device's 'Settings', select 'Apps', find Fever, and tap on 'Storage'. From there, select 'Clear Cache'. This can help resolve any temporary issues with the app.