The Elementor editor stops at the loading spinner because essential JavaScript assets are not available. The error appears at the top of the editor and prevents any widget or section from rendering.
Script loading relies on correct enqueueing and on a single instance of core libraries such as jQuery. When a theme or plugin registers the same library twice, or when a custom script omits the elementor-frontend dependency, the browser aborts execution. The result is a broken editor and missing front‑end interactions.
External factors also interrupt delivery. Aggressive cache or minification plugins may corrupt bundled files. Security modules, CSP headers, or mixed‑content requests block the files from reaching the browser. Each of these conditions produces 404, 403, or connection‑refused responses in the console.