The mini calendar is empty, no date are showing. This capture is from the sample application (New calendar app)
It can be patch with this code in onCalendarScriptInit
?>
<style>
#calendar_mini .fc-day-header {
opacity: unset !important;
}
#calendar_mini .fc-day-top {
opacity: unset !important;
}
#calendar_mini .fc-other-month {
opacity: .3 !important;
}
</style>
<?php