could not execute 'apt-key' to verify signature (is gnupg installed?)
Related code examples
gnupg, gnupg2 and gnupg1 do not seem to be installed, but one of them is required for this operation
Error: 0x80370102 The virtual machine could not be started because a required feature is not installed.
curl failed to verify the legitimacy of the server and therefore could not establish a secure connection to it.
twisted.internet.error.ReactorAlreadyInstalledError: reactor already installed  Failed to execute script main