Anthos bmctl update cluster fails -UPDATED*

[muanang]

Hi!

Would like to ask for any help to resolve my concern.
I'm trying to update my cluster (added address pool).
But when I'm running the bmctl update cluster command, I get authentication: <nil>
When I try to check it, results are okay via bmctl check cluster.

Error:

Check cluster:

Update*
Add verbose and here is the log

Btw, I'm using the original config yaml file I used for cluster installation.

Thanks!

Any help is much appreciated.

MD