Unable to login: Java.io.IOException: Could not obtain access token

Opening ReadyAPI brings up the "Activate ReadyAPI License" dialog. I selected "Login with SmartBear ID" and clicked the "Login" button, which successfully generated an activation code. However, when I click "Open Product", I receive the following error:

"Unable to login: java.io.IOException: Could not obtain access token"

I also tried copying the activation code and entering it manually into ReadyAPI, but I encountered the same error.

Could you please advise how I can resolve this issue?

Thank you.