installing nngraph via luarocks throws an error

[rykerryker123]

When I try to run the command:
luarocks install nngraph

This gets displayed:

"Installing https://raw.githubusercontent.com/torch/rocks/master/nngraph-scm-1.rockspec...
Using https://raw.githubusercontent.com/torch/rocks/master/nngraph-scm-1.rockspec... switching to 'build' mode
Cloning into 'nngraph'...
fatal: unable to connect to github.com:
github.com[0: 140.82.114.4]: errno=Connection timed out

Error: Failed cloning git repository."

I know I can connect to github correctly in the browser, and even cloning other repositories using git doesn't throw an error, so why is this happening? I assume it's because the repository is broken or doesn't exist anymore, but I want to see what the real issue is, because I don't see anyone talking about this in the issue tracker. Sorry if this is worded a bit weirdly.

OS: Ubuntu 22.04.2 LTS

[tginouye]

I was able to get around it eventually by using:

git config --global url.https://github.com/.insteadOf git://github.com/

I also ensured I had my gitconfig already created with my user information.