The Cloud9 workspace should be built by an IAM user with Administrator privileges, not the root account user. Please ensure you are logged in as an IAM user, not the root account user.
Use a single region for the duration of this workshop. This workshop supports the following regions, however:
If you are using the Events Engine please be aware that there are only two regions suported. They are N. California - us-west-1 and Oregon - us-west-2
You must use the t3.large instance type for this workshop. If the t3.large instance type is not available in the region you first selected, please choose a different region where the t3.large instance type is available.
You must use the Amazon Linux 2 platform type for this workshop. If the Amazon Linux 2 platform type is not available in the region you first selected, please choose a different region where the Amazon Linux 2 platform type is available.
Click Next Step, then click Create environment
When it comes up, customize the environment by closing the welcome tab and lower work area, and opening a new terminal tab in the main work area:
Your workspace should now look like this:
If you like this theme, you can choose it yourself by selecting View / Themes / Solarized / Solarized Dark in the Cloud9 workspace menu.