Curl error (6): Couldn’t resolve host name for https://mirrors.fedoraproject.org/metalink?repo=updates-released-f38&arch=x86_64 [Could not resolve host: mirrors.fedoraproject.org]
That is a network error. More specifically a DNS error.
Make sure you are properly connected to the network.
Thx … my bad!!! (I noticed it that my connection was faulty)