Unable to resolve force/lds from api/runtime/lwc-components/1.3.0-alpha/src/lightning/uiRecordApi/uiRecordApi.js

HTML

<template> <lightning-record-edit-form object-api-name="Contact" onsuccess={handleSuccess}> <lightning-messages></lightning-messages> <div class="slds-m-around_medium"> <lightning-input-field field-name='Id' value={contactId}></lightning-input-field> <lightning-input-field field-name='LastName'></lightning-input-field> <lightning-input-field field-name='FirstName'></lightning-input-field> <lightning-input-field field-name='Email'></lightning-input-field> <lightning-input-field field-name='AccountId'></lightning-input-field> <div class="slds-m-top_medium"> <lightning-button variant="brand" type="submit" name="save" label="Create Contact"> </lightning-button> </div> </div> </lightning-record-edit-form> 

JS

import { LightningElement, api,track } from 'lwc'; export default class app extends LightningElement { @track contactId; handleSuccess(event) { this.contactId = event.detail.id; } } 

Am getting following error when i ran the above code in Salesforce Play Ground. Since am new to salesforce, Can some one help me on this. Thank you