Hi @Sarvagna Mahakali the repository which you are trying to add might be behind the VPN, our service cannot access it since it has no access to the VPN network.
You may need the Enterprise Git / VPC to connect to the repository.Kindly check and let us know can we start the onboarding process of Enterprise GIt.
And try to change the setting below in workspace by enabling it and adding your GIT repos URL.Please let us know what are the outcomes.