title: AWS CLI -'Aws-shell' namespace object has no attribute: cli_binary_format
body: <p>When I attempt to use <code>aws-shell</code> to check my s3 bucket list I get this error:
  <a href="https://i.stack.imgur.com/7VgMR.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7VgMR.jpg" alt="enter image description here" /></a></p>
  <p>my environment is <code>[cloudshell-user@ip-10-0-***~]$ aws --version</code></p>
  <p><code>aws-cli/2.2.43 Python/3.8.8 Linux/4.14.252-195.483.amzn2.x86_64 exec-env/CloudShell exe/x86_64.amzn.2 prompt/off</code></p>
  <p>Is anything wrong with any of my Envir. verions? Pls advice</p>