google-optimize-loading-screen-fix.js

// ==UserScript==
// @name         Remove loading screen from Google Optimize
// @version      0.1
// @description  Script to remove the annoying loading screen...
// @author       @simondahla
// @match        https://optimize.google.com/optimize/home/
// ==/UserScript==

(function() {
    var element = document.getElementsByClassName('opt-busy-dialog')
    if (element.length > 0) {
        element[0].parentNode.removeChild(element[0]);
    }
})();