On my website (www.allevents3.com) I have this error when I'm trying to connect throught google :
We were unable to retrieve your Google account information. Please try again.
With log activated I have this error message :
error setting certificate verify locations: CAfile: *****/libraries/joomla/http/transport/cacert.pem CApath: none
Do you have any idea ?
In the JFBConnect -> Configuration area, please set the "Disable SSL Verification" setting to "Yes". That will fix an SSL issue that was introduced in Joomla 3.8. We have an updated release that will be coming out to fix this over the next week or so as well.
I hope that helps.