Urgent Post Fatal Error, I Don't Know Why

Hi there.

that error points to what looks like a sharing icons plugin that is added to your site using a Hook Element.
I would suggests reporting the issue to the Plugin author.

In the meantime disable that hook element, or try using a different plugin for your social shares.

Okay thanks. I made the social share button manually using a script. So now i'm using a plugin. Thank you for your help.

Glad to hear that.