Customizer not working

Hello, me again. So I fixed the page borders etc, but then wanted to remove footer credits. The plugins did not work, so I pasted show footer none code in the CSS field for the theme in Customizer. Now customizer is not working (loading endlessly). It worked at first when I pasted it and refreshed the page, and tried out all those footer plugins. But all of a sudden it stopped working and no I can’t access my pages from the colibri plugin to work on them.

Any solution to this?

I disabled and deleted all superfluous plugins already. Didn’t do anything.

Thank you again 🙂

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