Can't clone Github Repo with SourceTree on a Mac (OSX Montery)

[Paul Badger]

git@github.com:moderndevice/WindTunnel.git
/Users/paulbadger/Documents/Arduino/WindTunnelG

//result

hg clone git@github.com:moderndevice/WindTunnel.git /Users/paulbadger/Documents/Arduino/WindTunnelG
abort: repository git@github.com:moderndevice/WindTunnel.git not found!
Completed with errors, see above

I'm logging into the Github account. It reads the repo directory fine and I can click the "clone" link. Everything seems to work fine up to the point where it's supposed to clone and then can't find the file.

Any ideas?