Issue Summary

Certain spaces fail when trying to export to PDF, although page export will work. The export fails within the first few seconds with "Something went wrong". 

Steps to Reproduce

1. Create a space
2. Create some content, and add a child to at least one
3. Set home content to a child content
4. Rearrange the content tree so that there are multiple root level pages
5. Set page restrictions on one of the root level pages. Make sure you are not able to see that page.
6. Export to PDF

Expected Results

The export should run correctly and the file should be downloaded.

Actual Results

Export fails with "Something went wrong" error. Logs indicate that no valid content for export was able to be found.

Workaround

Export the desired pages via Page Export