Hi @EchoS
are you on any firewall?. Just to check can you try this as see if you are able to access this? GitHub Apps - UiPath · GitHub
And also on GIT search for install unknown apps in settings and enable it.
If its a managed GIT by any admin, ask them to give the permissions for installing unknown apps
If you find this of any use
https://docs.uipath.com/studio/docs/managing-projects-git
cheers