Error: Loading the editor's taking longer than usual. Give it a few moments, then refresh your page if it still doesn't load. Speak to your Confluence admin if that doesn't fix it.
This error is displayed when creating a new document or editing a document.
Cause: This can be because the service that enables collaborative editing "Synchrony" runs as an independent service listens on its own tcp port 8091. If the web browser can't reach the this port or if there is a proxy server in the path this could be the cause.
Fix: If you don't need the collaborative editing -
Go to configuration Gear > General Configuration > Collaborative editing (This is under the Administration heading) > Click change Mode, and select off.