thanks, after the command:
“curl -s ‘https://raw.githubusercontent.com/zerotier/ZeroTierOne/master/doc/contact%40zerotier.com.gpg’ | gpg --import && if z=$(curl -s ‘https://install.zerotier.com/’ | gpg); then echo “$z” | bash; fi”
comes this message
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0