Social login require a reload

I have setup the social login and the button has show up correctly.
When I tested, nothing is happening after I clicked the social login button (the one I tried is facebook).
I have to reload the page manually, and then it is already login as FB user.
I have tried to exclude the JS file from total cache that you have mentioned in other thread: Never minify the following JS files: “wp-content/plugins/wpdiscuz/assets/js”
But it doesn’t work.

Could it be there is some conflict with my theme?

The page I need help with: [log in to see the link]