What gameplay feature is this bug affecting?
My main lions cave

What's the issue? Please include any error messages you receive and as much detail as possible.
I tried to add a html to my main den but accidentally put it in the css slot, and now I can’t destroy the cave or fix the css. Also the whole look of the den is messed up too, I’m scared it’ll mess with my lions and that I’ll somehow loose them.

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
The den in question: https://www.lioden.com/cave.php?id=353290

Any screenshots you can provide us with?
I can! But I can only send them through discord!
My discord tag: venuslynx

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I had a html code to change the color background of my caves but I accidentally pasted the code in the css slot Not the html spot. Now I can’t destroy the cave and the whole layout looks wierd