Problem with 'wix-crm-backend'

Hi. I am trying to import {notifications} from wix-crm-backend but it keeps showing an error when I try to preview and the rest of the code doesn’t run. Any idea why this is happening ?

import wixData from 'wix-data';
import wixLocation from 'wix-location';
import {notifications} from 'wix-crm-backend';