Same here – no errors and have disabled parts that load scripts (social bar, sidebar, sliders…etc) and the widget still did not work. I did switch the theme over to WordPress’ default one and the calendar widget worked – I think this is going to be a jQuery conflict. It would be nice to have someone from Tribe to look at this – the theme I’m using is a popular one from themeforest so I assume there will be many more users with the same issue.