A. 1. Check payment method: Ensure that your payment method is valid and has sufficient funds. If using a card, check the expiration date.
2. Clear app cache: Go to 'Settings' > 'Apps' > 'G-STAR' > 'Storage' > 'Clear Cache'. This can help resolve issues with payment processing.
3. Try a different payment method: If one method fails, switch to another to see if the issue persists.
4. Restart the app: Close and reopen the app to refresh the payment process.