When you send a WhatsApp invite using Blitzz, the URL to join the code becomes clickable only when the person who receives the message responds to it. That is a security measure for spam control (clickjacking) implemented by WhatsApp, to which Blitzz has no control of.
To make the link clickable, ask the receiver to:
- Reply to the number you received the WhatsApp message from so WhatsApp knows its not spam.
- Navigate back to the chat list in WhatsApp (home screen)
- Now Open the recent message once again
- Notice the link is now clickable.
This needs to be done only once. Next time you receive an SMS from this number, it will be clickable.