To install an extension, go to the extension category on the Palette and press import extension. In the pop-up window , press choose file if you want to upload from your computer or choose URL if you have a url from a website and finally press import. Once imported , drag and drop the extension in the Viewer, to be able to use it. When you go to the block editor you can see that your extension is also there and you can use its blocks like you would do with all other components.
@dora_paz I followed the steps that you mentioned but still the phone call is not going through the app, I must have missed some part. All the components on the blocks also look so overwhelming..
There's a call icon on the group's tab in --> http://teamretreatapp.webflow.io/
In the website it works fine, it lets me make a call right through the website.
It is still giving me the error when I try it in-app.
If possible could you try it out and check whether the action is possible in-app or not. I am sure I am missing out something.