Are you trying to emulate Android? I’m not sure if I understand that image.
But if you check readme file you’ll see that there is a function in this plugin to detect if you’re using a desktop or a mobile device.
If you’re using a desktop, your redirect link should be something like this: https://web.whatsapp.com/…
When you access from any mobile, your link would be https://api.whatsapp.com/
This error is because WordPress is trying to show you a mobile api link but you’re using a web browser desktop.
If you’re trying to emulate android in a desktop, maybe is just because of this. You can try to exclude + before your contact number. (It’s not the same, but it works)
Another possibility is your cache acting saving your mobile information and showing even when you are in a desktop, just read readme file instructions.
