このエラーメッセージに関する原因と対処に関して説明します。
エラーメッセージ(英語)：
workspace keyboard not working
対処
関連リンク
AWS Developer Forums: Keyboard not working in Workspace with ...
https://forums.aws.amazon.com/thread.jspa?threadID=278583
Ipad Pro keyboard problem with Amazon ...
https://forums.aws.amazon.com/thread.jspa?threadID=292015
Windows client key mapping issue ...
https://forums.aws.amazon.com/thread.jspa?threadID=279601
Keyboard shortcut for switching out ...
https://forums.aws.amazon.com/thread.jspa?threadID=159825
Workspaces IOS X Keyboard Issue ...
https://forums.aws.amazon.com/thread.jspa?threadID=149523
Solution: Mac Keyboard input not working on AWS Workspaces
http://prosper.tracking202.com/blog/solution-mac-keyboard-input-not-working-on-aws-workspaces
AWS Workspaces Keyboard on Mac ・ Jeff Dickman - Blog
http://jeffdickman.com/aws/workspaces/2017/05/10/aws-workspaces-keyboard-on-mac.html
WorkSpacesを利用する際のTips キー入力編 ? サーバーワークス ...
http://blog.serverworks.co.jp/tech/2015/12/09/workspaces-keyboard-2/
Amazon Workspaces: A dish best served later ? The Register
https://www.theregister.co.uk/2014/03/28/workspaces_review/
Any way to toggle between local desktop and AWS Workspace in full ...
https://stackoverflow.com/questions/43747838/any-way-to-toggle-between-local-desktop-and-aws-workspa・・・