Lab Issue: Deploying Google Kubernetes Engine

[mvpkenlin]

I tried to run the lab of "Deploying Google Kubernetes Engine".
In the Task 3, I have created the sample nginx workload in us-central1-a but it cannot pass the verification. It just reported that I need to create cluster in us-central1-a. How can I get it done? 

I have end the lab 3 times and start the lab again, all 3 times are stack in the task 3 verification. Anyone else has the same experience? how do you get pass to it?