Please help! Pink background on one character / unable to edit

Hi everyone, please help. I was working on my lowercase “b” and did something to make the screen turn pink (but only when I’m trying to the “b”). I am unable to set the kerning, etc on the “b” but all other letters work fine. Not sure what I did wrong and how do I fix it? Thanks in advance.

You are on backgroung, press CMD+B

Thank you so much :slight_smile: