Occasional "Bad Gateway" Error When Previewing Larger Notebooks Answered

Some users have been experiencing a "Bad Gateway" error (see screenshot) when trying to preview certain notebooks. We have investigated the issue and determined that this is an intermittent error generated by the backend service that prints notebook previews. This tends to occur with larger notebooks and is likely due to individual network issues. If you're experiencing this issue, a workaround is to break up your notebook into smaller notebooks to reduce the error.