The Ombudsman have asked to be able to use EasyTimeline on their private wiki (db ombudsmenwiki ). While the extension is installed they are getting an error with the image being made 'Access Denied. You are not allowed to execute the action you have requested.'. My guess looking through the extension installation info is that , given the local file saving system for private wikis, it just doesn't have a folder to save into which it can write to. There may be a couple other pieces I'm missing though.