Is there a way to DVC import a private https git repo?

I am trying to perform a DVC import on a private https git repo. I am using a git credential manager to store the git credentials for the repo as recommended here. When I perform the dvc import command

dvc import https://gitlab.com/<repo>.git <directory>

I get an error saying:

ERROR: failed to import '<directory>' - SCM error: Failed to clone repo 'https://gitlab.com/<repo>.git' to '/tmp/tmp3xrgnmfjdvc-clone': ('Connection broken: IncompleteRead(71 bytes read)'

Any idea what might be the cause of this?

I have tried dvc importing various public repos and have no trouble.