axisFormat has been removed in v3 of fullcalendar. Please use slotLabelFormat...

axisFormat has been removed in v3 of fullcalendar. Please use slotLabelFormat instead. See this: https://fullcalendar.io/docs/agenda/axisFormat/

layouts/v7/modules/Calendar/resources/Calendar.js

@@ -1579,7 +1579,7 @@ Vtiger.Class("Calendar_Calendar_Js", {
 			editable: true,
 			eventLimit: true,
 			defaultView: userDefaultActivityView,
-			axisFormat: userDefaultTimeFormat,
+			slotLabelFormat: userDefaultTimeFormat,
 			timeFormat: userDefaultTimeFormat,
 			events: [],
 			monthNames: [