How do I install the Scrible Writer Add-on in Google Docs and connect to my Scrible account?

Install the Scrible Writer add-on from the Google Workspace Marketplace.  

Open a Google Doc and select  Extensions, Scrible Writer, and Start to open the sidebar.  

The first time you do this, you will need to connect your Scrible account. 

• Click the blue Connect to Scrible account button. A window will open to sign in.  After you sign in (or if you are already signed in) a page opens confirming you have successfully signed in. You can close that tab.  
• If the add-on is still showing the sign-in screen, close it and reopen the Scrible Writer add-on and you should be signed in.
• If during the connection step, you see a message saying that a token expired, return to the Google Doc, close the Scrible Writer add-on sidebar, then reopen it and try again.