Problem with Digital Line (already read info on forum)

Each time i'm trying to do a call from browser (Node server) I receive this message: You cannot use this device to make PSTN calls includinc Emergency Calls since no Digital Line is associated.

I have look into the forum and already follow the instruction from this page "https://support.ringcentral.com/article/ringcentral-phone-softphone-outbound-calling-adding-digital-line.html?language=en_US"

So i am not sure why i can't make the call. Would be glad if anybody can help me with this.

My app name:

• TestApp-3legAuth

And my email is: drapeaucharles@gmail.com