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.
# Changelog ## [0.1.0](https://github.com/espressif/esp-protocols/commits/tls_cxx-v0.1.0) ### Features - Publish mbedtls component ([0140455f](https://github.com/espressif/esp-protocols/commit/0140455f))
idf.py add-dependency "espressif/mbedtls_cxx^0.1.0"