A. 1. Check file format and size: Ensure your attachments meet the app's requirements for file type and size. 2. Clear app cache: Go to your device settings, find the JPay app, and clear its cache to resolve potential glitches.

B. 3. Restart the app: Close and reopen the app to refresh its functionality. 4. Try a different device: If possible, attempt to send the attachment from another device.