Giant Space on All Pages

Hey there, I logged in one day and suddenly there was a space that I cannot edit or modify, I’m not even sure what it is, but it’s thousands of lines long and I can’t get rid of it. Originally it was affecting all pages unless I disabled the header/footer, but now even with that disabled there is a HUGE space that cannot be edited. This sucks, and it’s enough to jump ship if this isn’t resolved.

Is there any, ANY access to the front end code? (HTML, XAML, etc.) I just need to see what this is and modify its parameters.

The walled garden is hindering my efforts here.

Ctrl-A-Del gets rid of it, and everything else as well. This is useless.
Checking out WordPress, this is asinine. Not sure how anyone can tolerate this editor.

you can simple check it form inspect elements, and remove it from css