Unable to Connect to Salesforce through External Client App.

[eschber]

Initial error is Access Token expired, Generate new Token. When I generate a new token it takes me to a blank page. this URL chrome-extension://dbfimaflmomgldabcphgolbeoamjogji/data-export.html?code=aPrxsFoCW6g04LBqyud5JHoXzmp29bW_q4KQhQd1LDjtdh9oqVHqUlCyuE4FC7talBL6USF7pF_GHqKZugIWMLXc73NaZ8A%3D&state=scusa--dev.sandbox.my.salesforce.com

In the login access log Failed: Missing Consumer Key Parameter

I confirmed the customer key is configured in the AIP settings

API Access Control enabled
External Client App configured
profile assigned on the client app
Use Any API Client granted
OAuth callback returns code=...
subsequent XHRs fail with INVALID_SESSION_ID