net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

I am getting this problem while pushing the images to registry.

I'm using Ubuntu server inside Ubuntu docker installed, and inside the docker created docker registry container and I have an issue while while registry is integrating with gitlab.

Both gitlab and registry are on same server.

I have created a registry under same domain of gitlab.

no code

Get https://someurl:8000/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)