ESS sync has been failing for me for several hours now with base error “Comm error”. The detailed status from the desktop is giving is:
Communication error: Request has been terminated Possible causes: the network is offline, Origin is not allowed by Access-Control-Allow-Origin, the page is being unloaded, etc.
Communication error: Timeout of 5000ms exceeded
Finally, it seems https://sync.everdo.net is not responding as well.