Hey,
I sometimes get error (see image below) when opening NZBGet web-interface.
Sometimes meaning it's quite random, and I'm not sure whats causing it.
When pressing F5, it'll go away and show the web-interface normally.
I'm using NZBGet v14.1 on Windows 7 x64 SP1 as a service, and accessing the web-interface via Firefox v34.0.5