Error: Rendering this content exceeded the timeout of X seconds.

Summary

When loading heavy pages - with several Jira Macros, Attachments and/or Tables - they load a Error: Rendering this content exceeded the timeout of 30 seconds. message instead of the page's content.

Steps to Reproduce

1. Create a Confluence page
2. Add at least 200 Attachments to that page - some tables and Jira Macros, if possible - and make then viewable within the page
3. Publish the Page

Expected Results

The page would load. It would take some time, due to the time of loading all the contents, but it would load as expected.

Actual Results

The page keeps loading for a while, then displays the Error: Rendering this content exceeded the timeout of 30 seconds. message.

Workaround (Split Content)

1. Edit the page by going into edit mode through the URL: https://<YOURSITE>.atlassian.net/wiki/spaces/<SPACEKEY>/pages/edit/<PageID>
2. Copy/Cut part of the content
3. Create a new page to paste the copied excerpt
4. Publish the new page