Scheduler Component Causing Can't perform a React state update on an unmounted component error

So we are implementing the scheduler and are getting the following error:

index.js:1 Warning: Can't perform a React state update on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method.
    in KendoReactForm (created by SchedulerForm)
    in SchedulerForm (created by KendoReactSchedulerEditSlot)

This error occurs after trying to close the edit event window provided when trying to add or edit an event on any day. We've commented out pretty much every piece of code that we wrote and left only the scheduler component in its most basic form. Cant seem to get rid of the error no matter what we tried.  The code is below, though i removed a few pieces of identifiable information:

import React, {Component} from 'react';
import { Scheduler, TimelineView, DayView, MonthView } from '@progress/kendo-react-scheduler';
import { guid } from '@progress/kendo-react-common';
import { Day } from '@progress/kendo-date-math';
import axios from 'axios';


export default class SchedulerComponent extends Component {
constructor(props) {
super(props);
this._isMounted = false
this.state = {
// data: [{}],
// loading: false,
// hasError: false,
// setData: null
};
// this.handleDataChange = this.handleDataChange.bind(this);
}

componentDidMount () {
this._isMounted = true
// this.setState({loading: true, mounted: true})
// .then( ( response ) => {
// this.setState( {
// data: response.data,
// loading: false
// } )
// console.log(this.state.data)
// } )
// .catch(err => {
// this.setState( {
// hasError: true,
// loading: false
// } )
// } )

}

componentWillMount () {
this._isMounted = false
}

// handleSubmit = event => {
// event.preventDefault();

// const dataupdate = {
// data: this.state.data
// };

// axios.post('/post_scheduler_data', { dataupdate })
// .then(res => {
// console.log(res);
// console.log(res.data);
// })
// }

componentWillUnmount() {
this._isMounted = false
}

handleSubmit = () => {
this._isMounted && this.setState({ready: true})
// const updateData = {
// data: this.state.data
// }
// axios.post('/post_scheduler_data', updateData)
// .then(response =>
// console.log(response.data)
// )
// .catch(error => console.log(error));
}

handleDataChange = () => {
this._isMounted && this.setState({ready: true})
}

// handleDataChange = ({ created, updated, deleted }) => {
// setData = this.state.data
// setData(old => old
// // Filter the deleted items
// .filter((item) => deleted.find(current => current.id === item.id) === undefined)
// // Find and replace the updated items
// .map((item) => updated.find(current => current.id === item.id) || item)
// // Add the newly created items and assign an `id`.
// .concat(created.map((item) => Object.assign({}, item, { id: guid() }))))
// }





render() {
// const currentYear = new Date().getFullYear();
// const randomInt = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
// const displayDate = new Date(Date.UTC(currentYear, 7, 24));
//
// const parseAdjust = (eventDate) => {
// const date = new Date(eventDate);
// date.setFullYear(currentYear);
// return date;
// }
//
// const customModelFields = {
// id: 'TaskID',
// title: 'Title',
// description: 'Description',
// start: 'Start',
// end: 'End',
// recurrenceRule: 'RecurrenceRule',
// recurrenceId: 'RecurrenceID',
// recurrenceExceptions: 'RecurrenceException',
// category: 'Category'
// };
//
// const sampleData = this.state.data.map(dataItem => (
// {
// id: dataItem.TaskID,
// start: parseAdjust(dataItem.Start),
// startTimezone: dataItem.startTimezone,
// end: parseAdjust(dataItem.End),
// endTimezone: dataItem.endTimezone,
// isAllDay: dataItem.isAllDay,
// title: dataItem.Title,
// description: dataItem.Description,
// recurrenceRule: dataItem.RecurrenceRule,
// recurrenceId: dataItem.RecurrenceID,
// recurrenceExceptions: dataItem.RecurrenceException,
//
// category: dataItem.category,
// ownerID: dataItem.OwnerID,
// personId: dataItem.OwnerID
// }
// ));
//
// const sampleDataWithResources = this.state.data.map(dataItem => (
// {
// id: dataItem.TaskID,
// start: parseAdjust(dataItem.Start),
// startTimezone: dataItem.startTimezone,
// end: parseAdjust(dataItem.End),
// endTimezone: dataItem.endTimezone,
// isAllDay: dataItem.isAllDay,
// title: dataItem.Title,
// description: dataItem.Description,
// recurrenceRule: dataItem.RecurrenceRule,
// recurrenceId: dataItem.RecurrenceID,
// recurrenceExceptions: dataItem.RecurrenceException,
// roomId: randomInt(1, 2),
// category: randomInt(1, 2),
// }
// ));
//
// const sampleDataWithCustomSchema = this.state.data.map(dataItem => (
// {
// ...dataItem,
// Start: parseAdjust(dataItem.Start),
// End: parseAdjust(dataItem.End),
// PersonIDs: randomInt(1, 2),
// Category: randomInt(1, 2),
// }
// ));
//
// const resources = [{
// name: 'Meeting Type',
// data: [
// ],
// field: 'category',
// valueField: 'value',
// textField: 'text',
// colorField: 'color'
// }]

return(
<Scheduler
// resources={resources}
// data={sampleData}
// onDataChange={this.handleDataChange}
editable={{
add: true,
// remove: true,
// drag: true,
// resize: true,
// edit: true
}}
// defaultDate={displayDate}
// defaultView="month"
// onSubmit={this.handleSubmit}
>
{/*<MonthView */}
{/* title="Month"*/}
{/* selectedDateFormat="{0:M}"*/}
{/* selectedShortDateFormat="{0:M}"*/}
{/*/>*/}
{/*<DayView numberOfDays={2}/>*/}
{/*<TimelineView*/}

{/* numberOfDays={2}*/}

{/* columnWidth={75}*/}
{/* slotDuration={60}*/}
{/* slotDivisions={1}*/}

{/* startTime={"08:00"}*/}
{/* endTime={"18:00"}*/}

{/* workDayStart={"08:00"}*/}
{/* workDayEnd={"17:00"}*/}

{/* workWeekStart={Day.Sunday}*/}
{/* workWeekEnd={Day.Monday}*/}

{/* showWorkHours={false} */}
{/*/>*/}
</Scheduler>

)
}
}