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_0f01a474-7aed-4900-a9b1-992ba0af98cf_deletable_wrong_ver=1.0.0:cmp_ex"