Zendesk Embedded Agent issue

While embedding the agent to Zendesk, Invoke method on client object is not working once we login to application as we are getting value for client object as false.

We are creating client object as below:

client = window.ZAFClient.init();

client.invoke('routeTo', 'ticket', 780);

We tried calling init on ZAFClient method by passing search parameter as given below so that we get client object as expected before and after login to CXone agent application but it does not work. When we create a client object as below, the invoke method on client object does not throw an error but does not work as well.

client = window.ZAFClient.init(() => {

   console.log('initialize callback');

}, {

   search: "app=cxa_zd&origin=https://d3v-niceincontact.zendesk.com&app_guid=5950dfec-e7f0-4b73-a4e0-1fcda089356e"

});

client.invoke('routeTo', 'ticket', 780);