If you are facing an error while sending an invoice on WhatsApp, below are the possible reasons for it.

1) Maybe poor internet connection

• Please check internet is working on your Laptop / Personal computer.
• If the system connection is working fine, then check the internet connection of your mobile.
• If the internet is disconnected from mobile during login, please try again by scanning the QR code.

2) Firewall issue

• In case the firewall was enabled on your system also may problem in connection via web.whatsapp.com. Allow domain in firewall settings.

3) Restart App

• Suppose you still facing an issue in login, then close the desktop application and start it again.