I had this error once and was able to resolve it. Now it happens again, after some changes I did. However, I can't tell what it was exactly. To have a better understanding in order to continue analysing the error, I whould like to know, why the scheduler show this error, although the element exists in the DOM (please see the screen shot)
Error: DayPilot.Scheduler: The placeholder element not found: 'dp_1673963716024126533'.
at new DayPilot.Exception (daypilot-pro-angular.mjs:989:389)
at DayPilot.Scheduler.Mg (daypilot-pro-angular.mjs:10467:27)
at DayPilot.Scheduler.init (daypilot-pro-angular.mjs:10469:132)
at DayPilotSchedulerComponent.ngAfterViewInit (daypilot-pro-angular.mjs:11173:22)
at callHook (core.mjs:2577:22)
at callHooks (core.mjs:2546:17)
at executeInitAndCheckHooks (core.mjs:2497:9)
at refreshView (core.mjs:11853:21)
at refreshComponent (core.mjs:12921:13)
at refreshChildComponents (core.mjs:11572:9)