Why doesn't the social services module work for me?

Question

1C-Bitrix

I noted in the settings of the modules that the social network VKontakte, Facebook and classmates. In the settings of VKontakte, Facebook and classmates, I registered the id of the application and the secret keys to them. In the main module in the authorization, there is a checkbox "Allow authorization through external services:"
And when you open some icon, this error occurs.
An error occurs .

ss.js?15295025841419:13 Uncaught TypeError: Cannot set property 'className' of null

Answer 1

Of course, this is trite, but you need to put a debugger in ss.js?15295025841419:13 and see why you have an empty object with the className property