You are using staging server - a separate instance of the ESP Component Registry that allows you to try distribution tools and processes without affecting the real registry.
To create a project from this example, run:
idf.py create-project-from-example "test_component_manager/test_d2607bfc-0f0a-4fd0-80c8-41bee770d64c_yankable=1.0.0:cmp_ex"