So I'm trying to install kubectl from the official repository but I'm getting an error while adding their key: https://packages.cloud.google.com/apt/doc/apt-key.gpg .
I've tried user@machine:~/Downloads$ gpg --verify apt-key.gpg
gpg: verify signatures failed: Unexpected error
Is it a bad key for you also? I'm using a DeepinOS for the first time so perhaps it's some internal issue?