I've also encountered this. I've used both Firefox and Chromium based browsers and found this error still occurs. I have, however, discovered a pattern whereby if the article can be created and a title or content added to the article IMMEDIATELY, it seems to properly load. Sometimes, if I create a new article I will immediately get the error regardless. If I click off an untitled article with no content, I can consistently recreate this error.
My browsers are Zen and Brave.