It happens when I press publish by mistake and press the x button I get this error and the app shuts down. I just tried it from on a different computer and same happened. press publish and directly press the x button.
The error is returned stopping the process of signing in to Business Catalyst after you click on Publish. Please let the process complete and then you can click on Cancel button when next dialogue box appears. If you stop in the middle of signing in and the Muse application is shutdown, restarting Muse application will give you a prompt -> http://screencast.com/t/cD3Zi4Ec. Please click on Yes to continue without any loss.