Hi ​@at8j, thanks for posting in the Lucid Community! Are you still experiencing issues when trying to download your file? 

To start with, here are a few suggestions that may help:

• Try the export in a Chrome Incognito browsing session. This often improves performance by clearing your cache and cookies and disabling your extensions.
• Sometimes issues like this can be related to internet connection speed or network security. Please try the export again on another network, ensuring that you are on a strong, stable connection.
• Is the page that you are trying to export a Master Page? If so, it will be omitted from the downloaded version of your document and you will need to convert it into a page before exporting. To do this, left-click on your Master Page tab and select "Convert to Page."

If the issue persists, please sent the following information in this thread so I can take a closer look for you:

• A description of the download settings (file type, document pages, cropping, quality, etc.) that you selected for the download.
• A screenshot of any error messages or pop-ups that appear when you attempt to export.
• If the document will export but does not look as you expected, please send me the downloaded file and a description of what about it is incorrect, or a screenshot of the issue in the exported document.
• A screenshot of the associated Javascript Console output. You can open your Javascript Console by pressing Ctrl + Shift + J (if your computer is a Windows / Linux) OR Cmd + Opt + J (if your computer is a Mac).