A. 1. Check your internet connection: A weak connection can cause issues during checkout. Switch to a stronger network if possible. 2. Clear app cache: Go to 'Settings' > 'Apps' > 'G-STAR' > 'Storage' > 'Clear Cache'. This can help resolve loading issues. 3. Try a different payment method: If one payment method fails, try using another to see if the issue persists. 4. Restart the app: Close the app completely and reopen it to see if the checkout process works after a fresh start.