help commands do not work

[pyrocks]

~/somefolder > which aws
aws: aliased to aws-mfa-secure session

~/somefolder > /usr/local/bin/aws s3 help
<help opens>

~/somefolder > aws s3 help

usage: aws [options] <command> <subcommand> [<subcommand> ...] [parameters]
To see help text, you can run:

  aws help
  aws <command> help
  aws <command> <subcommand> help

aws: error: argument subcommand: Invalid choice, valid choices are:

topics                                   | config-vars
return-codes                             | s3-config
s3-faq                                   | ddb-expressions