Okta Integration - Throwing timeout error if not logged in to my admin account

I have integrated Okta with my web application for authenticate and authorization. I have a okta-dev (okta-dev-8*****4) account that I am using for configuration.

If I login to okta-dev-7*****4 account on a separate browser window and then access the web app, It works fine. It asks for the credentials. On successful login, it takes me back to the webapp.

If I do not login to okta-dev-7*****4 account on a separate browser window and then access the web app, it throws this error:

Connecting to My Web App Sign in with your okta-dev-7*****4 account to access My Web App

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Following is my application settings

This is what I see in the network tab