I have just downloaded and tried to use the new Calendar widget and there seems to be a bad file name. I get this error: 404 - file not found for file: widgets/calendar/widget/lib/fullcalendar-min.js When I check my deployment directory, the file is named fullcalendar.min.js. If I rename this file to replace the period with a hyphen it then works. BTW. Nice widget !!
Thanks for the work-around, I've fixed the problem and the new version is now available on the AppStore.
I've also added some additional documentation for the advanced parameters.