Each provider link in backend also links to the HybridAuth documentation for that social site. In addition to that our below tutorials in some cases are still relevant.
www.joomlapolis.com/support/tutorials/99-plugins
I won't have the tutorials updated until after GJ upgrade. Once I've finished the GJ upgrade I will redo all the CB Connect tutorials and some video tutorials are also being planned.
With all of that said I am still waiting on HybridAuth 3, which is a complete rewrite of HybridAuth and is more compatible with the latest social site APIs. Until that happens CB Connect API wise is held back and may have difficulties and the social sites force API migrations. Regardless however I, and Nick, have retested the social sites as working. So if it does not work it's likely the result of configuration issue, server issue, or maybe a conflict with another plugin/extension.
Please understand you posted in the support forums. This is not for community discussions. Please use the community forums for community discussions. Expect staff replies in the support forums.