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_1a38a0bc-74d9-42d1-a2c0-32e859c01905_deletable_wrong_ver=1.0.0:cmp_ex"