我尝试使用 docker 命令安装 instana 代理，它可以工作，但我需要使用一个 liner 命令安装它，并且在尝试时它会给出如下错误：
curl -o setup_agent.sh https://setup.instana.io/agent && sudo chmod 700 ./setup_agent.sh && sudo ./setup_agent.sh -a <myinstanakeyreplaced> -t dynamic -l us -y -s
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 12664 100 12664 0 0 11439 0 0:00:01 0:00:01 --:--:-- 11439
Setting up Instana agent for GNU/Linux
Setting up Instana APT repository
Importing Instana GPG key
Warning: apt-key output should not be parsed (stdout is not a terminal)
Updating apt metadata ...
W: GPG error: https://packages.instana.io/agent/deb generic Release: Detached signature file '/var/lib/apt/lists/partial/packages.instana.io_agent_deb_dists_generic_Release.gpg' is in unsupported binary format
E: The repository 'https://packages.instana.io/agent/deb generic Release' is not signed.
我试过私人wifi（没有代理），但还是一样。任何人都可以帮助解决这个错误吗？
谢谢！