• Since updating to 13.1.1, opening the Stylebook and editing any Global Class shows “This block has encountered an error and cannot be previewed”. The browser console shows ReferenceError: none is not defined, thrown from the Global Class editor renderer in build/gspbLibrary.js. The control sets a JSX style with background:none (unquoted), so JS evaluates none as an undefined variable. It should be the string background:"none". It affects every global class (even ones with no none value). 13.0.0 does not have this code and works fine. Repro: WP + Greenshift 13.1.1 → Stylebook → edit any global class.

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