Import package from git to unity via link

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Unity2D

I encountered an issue, I am unable to get the package from Git to Unity, I get this error message:

Package Manager Window] Unable to add package ["com.unity.2d.tilemap.extras": "https://github.com/Unity-Technologies/2d-extras.git#master"]:
Package name '"com.unity.2d.tilemap.extras": "https://github.com/Unity-Technologies/2d-extras.git#master"' is invalid.
UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()


Do you have an idea on how I could fix this?

What I have tried:

I checked all the updates needed, restarted Unity, it made no change