I am learning Lightning:Data service from trailhead. I was trying to execute this lightning component but getting this error. kindly me help me with the program.
Component:
<aura:component implements="flexipage:availableForRecordHome, force:hasRecordId"> <!--inherit recordId attribute-->
<aura:attribute name="record" type="Object" />
<aura:attribute name="simpleRecord" type="Object" />
<aura:attribute name="recordError" type="String" />
<force:recordData aura:id="recordEditor"
    layoutType="FULL"
    recordId="{!v.recordId}"
    targetError="{!v.recordError}"
    targetRecord="{!v.record}"
    targetFields ="{!v.simpleRecord}"
    mode="EDIT" />
    <!-- Display a lightning card with details about the record -->
    <div class="Record Details"> 
        <lightning:card iconName="standard:account" title="{!v.simpleRecord.Name}" >
            <div class="slds-p-horizontal--small">
                <p class="slds-text-heading--small">
                    <lightning:formattedText title="Billing State" value="{!v.simpleRecord.BillingState}" /></p>
                <p class="slds-text-heading--small">
                     <lightning:formattedText title="Billing City" value="{!v.simpleRecord.BillingCity}" /></p>
            </div>
        </lightning:card>
    </div>
    <br/>
    <!-- Display an editing form -->
    <div class="Record Details">
        <lightning:card iconName="action:edit" title="Edit Account">
            <div class="slds-p-horizontal--small">
                <lightning:input label="Account Name" value="{!v.simpleRecord.Name}"/>
                <br/>
                <lightning:button label="Save Account" variant="brand" onclick="{!c.handleSaveRecord}" />
            </div>
        </lightning:card>
    </div>
    <!-- Display Lightning Data Service errors, if any -->
    <aura:if isTrue="{!not(empty(v.recordError))}">
        <div class="recordError">
            {!v.recordError}</div>
    </aura:if>
</aura:component>

Client-Controller:
({
    handleSaveRecord: function(component, event, helper) {  
        component.find("recordEditor").saveRecord($A.getCallback(function(saveResult) {
            if (saveResult.state === "SUCCESS" || saveResult.state === "DRAFT") {
                console.log("Save completed successfully.");
            } else if (saveResult.state === "INCOMPLETE") {
                console.log("User is offline, device doesn't support drafts.");
            } else if (saveResult.state === "ERROR") {
                console.log('Problem saving record, error: ' + 
                           JSON.stringify(saveResult.error));
            } else {
                console.log('Unknown problem, state: ' + saveResult.state + ', error: ' + JSON.stringify(saveResult.error));
            }
        }));}
})

Here is the Error I am getting.