What happens next?

How to deal with social media fails
Assess the damage.
Was the error simply a rogue tweet or random misspelling within a post? Quickly assess the damage.
Was anyone harmed by the content shared? Was the content offensive? Was any information tweeted or posted for private consumption only? Is there a possibility that this will spiral into a bigger issue?
Admit your mistake right away.
There is nothing wrong in admitting your mistake. There are bad times as well as good times when it comes to social media.