kendo scheduler's "this..intlService.weekendRange is not a function" error in kendo

How to solve this. Is anybody know? Error I see is below.

Console error;

ng:///PersonLeaveModule/PersonLeaveCalendarNewComponent.ngfactory.js:7 ERROR TypeError: this.intlService.weekendRange is not a function
at SchedulerComponent.get [as workWeek] (webpack-internal:///../../../../@progress/kendo-angular-scheduler/dist/fesm5/index.js:2710)
at SchedulerComponent.notifyOptionsChange (webpack-internal:///../../../../@progress/kendo-angular-scheduler/dist/fesm5/index.js:2669)
at SchedulerComponent.ngAfterContentInit (webpack-internal:///../../../../@progress/kendo-angular-scheduler/dist/fesm5/index.js:2417)
at callProviderLifecycles (webpack-internal:///../../../core/esm5/core.js:12915)
at callElementProvidersLifecycles (webpack-internal:///../../../core/esm5/core.js:12889)
at callLifecycleHooksChildrenFirst (webpack-internal:///../../../core/esm5/core.js:12872)
at checkAndUpdateView (webpack-internal:///../../../core/esm5/core.js:14022)
at callViewAction (webpack-internal:///../../../core/esm5/core.js:14369)
at execComponentViewsAction (webpack-internal:///../../../core/esm5/core.js:14301)
at checkAndUpdateView (webpack-internal:///../../../core/esm5/core.js:14024)