I am unable to continue forward from the: Learn About Agentforce Sales Everywhere Challenge. I keep receiving the error that the system can't verify that I have logged into the Salesforce Extension. I've tried multiple times and followed the instructions.

Hi , 

 for anyone who cannot find it, the "Keep me logged in" checkbox is only an option upon login to the extension. So you'll have to log out, check the box, and then log back in.