Thanks to user:BeneBane's work you will find a fix here: https://gerrit.wikimedia.org/g/mediawiki/extensions/MsCalendar/%2Blog/master that fixes issues for 1.39. My system is up and running fine now with MScalendar extention.
Fixed in version 3.0
Thanks to user:BeneBane's work you will find a fix here: https://gerrit.wikimedia.org/g/mediawiki/extensions/MsCalendar/%2Blog/master that fixes issues for 1.39. My system is up and running fine now with MScalendar extention.