Dataiku git for plugin, pull fail

Dear community,

Right now I'm tring to connect to a git remote repository. As recommended by the documentation, I started from an empty repo, but it still says that my plugin in dataiku has serval commits behind my remote repo. So in this case, I need to do "pull" first. But the pull is fatal with this error.

Do you know where should I run this config, in the server which hosts dataiku?

And I created a dev branch in dataiku as well. After pushing this new branch to my remote git, all "push" "pull" actions can be done successfully.

So what should I do to make master branch work like dev branch?

Thanks for your reply in advance