How to rewrite the class for authorization through VK in the 1s-Bitrix social services module?

Question

1C-Bitrix

Faced such a problem that registration / authorization through VK stopped working on the site. Bitrix version 17.5.9 php version 7.0.33. At the moment, I was given the task of solving the problem without resorting to updating the kernel, the error is displayed in the address bar "?auth_service_id=VKontakte&auth_service_error=1". I think that the module stopped working normally due to the fact that it was not updated. Since in Bitrix you first need to copy what you want to change, then change and connect it to where it should work, and I don’t know this system so well, I need your advice if I want to write my own class for authorization through VK, but so he also worked with the social services module, where to copy what and where to connect it so that it works?) Well, or maybe someone has an option how to solve this problem without a lot of work. In any case, I will be grateful for any answer. If it helps, now the class looks like thishttps://xpaste.pro/p/t5mtNVsp