Thanks for posting here in the Community, @gregoryrpg.
This could be a browser issue. Let's perform some browser troubleshooting steps. First, let's access your account via a private or incognito browser. Here's how:
If the left menu bar appears, then will have to clear your browser's regular cache to optimize your browser performance.
If the error still persists, please consider using another supported browser.
Please let me know if you have other questions in the comment section below. I'll be around to help. Have a great day!