Updated CB Connect to latest version 3.1.
Followed instructions to login to the Google API Console, created a project, created an OAutho 2.0 client ID, etc. and entered a Client ID, Client Secret and API Key and enabled it.
The Google login button shows up, but when you click on it, you receive a popup with the following message:
Error: origin_mismatch
Please see attached snapshot.
Running CB 1.9 on Joomla 1.5.23
How can I resolve this issue?