Geneious R11.1 incorporates functionality to allow users to define and search AWS-hosted NCBI Blast instances (https://aws.amazon.com/marketplace/pp/B00N44P7L6/ref=mkt_wir_ncbi_blast).
Since the release of R11.1 NCBI have preconfigured Cloud blast to require web authentication (http://ncbi.github.io/blast-cloud/usage/authentication.html). Geneious R11.1 is not configured to handle the authentication process. Proper handling of authentication is on our developers backlog.
Geneious R11.1 users who wish to access AWS cloud blast will need to turn off web authentication.
AWS Cloud Blast cannot be used with Geneious R10.2 or earlier.