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_ab6ba26d-c310-4da6-9a09-5ea281af354c_deletable_wrong_ver=1.0.0:cmp_ex"