extension enable and not display , how to debug?

hi,
my oc version is 3.0.3.7
i want to add some social login function , after i install a extension ex_advanced-social-login which i chose the version that suit the oc3.x, and config it as enable, nothing any social icon show in front login page, I have know some about php, any ways i can debug the extension or any logs i can use to find out why it doesn't work?

Have you placed it in Design/ layout there where you need to appear?

Have you refreshed theme cache in dashboard?

And have you contacted the extension author?