1. Make sure “Require Agent Online” is Off.

2. Check  “Permitted Domains” in the Chat Deployment.

Company Website URL to test from the Website
www.infallibletechie.com

Visualforce Domain URL to test from Visualforce page
infallibletechi2-dev-ed–c.visualforce.com

Domain URL to test from Bot Builder
infallibletechi2-dev-ed.my.salesforce.com