X (Twitter) Login is not working

I added all the social login available in this plugin to my website. All except the X (Twitter) login are working nicely. When I try X (Twitter) login, it gives the error: There has been a critical error on this website. Help me to solve it.

Review: This is a wonderful plugin. I was looking for a social login plugin for my website. I tried some other most of which are not free. I guess the author is a wonderful person to offer us a great plugin like this. But this plugin has not been updated for the last 6 months. Please keep it updated to support the current WordPress version.