Hello.
I had a similar issue to phatria01, and I tried to follow these instructions, but when I go to Appearance -> Customize -> Styling -> Custom CSS, there is a only button the reads “Open Editor”.
When I click the button I get a black semi-transparent layover, with a “1” in the top left corner, but I am unable to edit anything.
When I simply go to Appearance -> Editor, there is no “Custom CSS” file.
For now I made the change I need in Style.css, but I know this will be overwritten if there is a theme update.
