Null PDU and devices

[AtlosPrime]

When I'm sending sms in the desktop app, or in the web (https://testsjoaomgcd.appspot.com/ and https://joinjoaomgcd.appspot.com/) the message is well sent, but, in the web or dekstop it doesn't save the message I sent and on my phone I get error : Null PDU Oh, and in the join app on my phone, in the device tab, there is only my phone and not my desktop app or even the web app

[joaomgcd]

Hi. You are only supposed to use https://joinjoaomgcd.appspot.com/ now. When you go there, does it prompt you to register the website as a device?