Merge pull request #14766 from primefaces/issue-14737

Fixed #14737 - Multiselect | headerCheckboxViewChild not found

src/app/components/multiselect/multiselect.ts

@@ -1833,7 +1833,7 @@ export class MultiSelect implements OnInit, AfterViewInit, AfterContentInit, Aft
             this.updateModel(value, event);
         }
 
-        DomHandler.focus(this.headerCheckboxViewChild.nativeElement);
+        DomHandler.focus(this.headerCheckboxViewChild?.nativeElement);
         this.headerCheckboxFocus = true;
 
         event.preventDefault();