I have two bugs to report when using this plugin on phpbb 3.1.6.
1. Redirection field is not working. It's not redirecting to page which I input.
2. After I log in on the forum using facebook for example, forum still looks like I'm logged out. If I navigate to other page from there, then it shows that I'm logged in.
I hope this can be fixed. I'm willing to provide more information if necessary.