Implement Load Balancing on Compute Engine: Challenge Lab

Even though i have created the nginx web server with instance group, i keep getting error as "Please create managed instance group with 2 nginx web-server." I can see both the managed instance group and also the servers. But still i get this error. Can you please guide me on this. 

0 1 256
1 REPLY 1

It seems mean that you have to open two tabs and log in two different accounts to test.