I ran CCleaner on a laptop and now cannot log in to facebook.
Highly doubtful, at most you'd have to re-login. perhaps give more information. What happens when you try to log in, what messages from the webpage do you see?
I sent a message, sorry I am new to this site. I this is what I get from facebook.
Sorry, this feature isn't available right nowAn error occurred while processing this request. Please try again later.
That sounds like a server side (at Facebook) error, it couldn't be caused by ccleaner
Facebook suggests you follow these instructions
https://facebook.com/help/186570224871049
(Note, I don't fault you for not being able to find that hundreds of facebook users seem to face this issue with zero input from facebook)
First reboot laptop, second try to turn off it and again