unable to access 'https://github.com/KhronosGroup/Vulkan-Headers/': Failed to connect to github.com port 443 after 21129 ms: Could not connect to server

Fetched in submodule path 'Dependencies/Vulkan-Headers', but it did not contain 29f979ee5aa58b7b005f805ea8df7a855c39ff37. Direct fetching of that commit failed.