Cannot get Canyon running

[AnalogStick]

I've been trying to run canyon with minecraft beta 1.7.3 and I've been unsuccessful. I'm not sure what I'm doing wrong but here's the log.

[init] Running as uid=1000 gid=1000 with /data as 'drwxrwxr-x 2 1000 1000 4096 Apr 7 01:29 /data'
[init] Resolved version given b1.7.3 into b1.7.3 and major version b1.7
[init] Resolving type given CANYON
curl: (22) The requested URL returned error: 410

Any help would be appreciated.

[itzg]

Seems to be gone: 🤷‍♂️