I am having the same problem. I tried the suggested troubleshooting using the steps outlined in the KB article and nothing worked. It worked fine this morning when I updated my plugin and then proceeded to update my page, however, when I came back to my site to edit again tonight, I couldn’t get it to load. The loading bar indicates that it is trying to load the page, but it just sits on the loading page with the Elementor loading logo.
Any help or insight would be great. In the mean time, I have rolled back to version 1.9.8 and got Elementor to load properly. Me thinks it’s a version update issue.