If you are participating in this workshop as part of SC22, then PCluster Manager will already be deployed for you.
Once your PCluster Manager CloudFormation stack has been deployed, you can follow these steps to connect to it:
Open the AWS CloudFormation console.
You’ll see two stacks named mod-[random hash]. Click on the second stack (mod-187330a4e44c489a), then click on the Outputs tab, and finally click on the PclusterManagerUrl to connect to PCluster Manager.