下载不了啊

[Dragonkingpan]

Unable to add package [https://github.com/ViveSoftware/VIVE-Wave.git?path=com.htc.upm.wave.essence]:
Error when executing git command. fatal: unable to access 'https://github.com/ViveSoftware/VIVE-Wave.git/': Failed to connect to github.com port 443 after 21042 ms: Timed out