imposible to push to a gitlab repo without a master branch

remote: GitLab: 
remote: A default branch (e.g. master) does not yet exist for duneuro/brainstorm/duneuro-bst
remote: Ask a project Owner or Maintainer to create a default branch:
remote: 
remote:   https://gitlab.dune-project.org/duneuro/brainstorm/duneuro-bst/-/project_members
remote: 
To https://gitlab.dune-project.org/duneuro/brainstorm/duneuro-bst.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://gitlab.dune-project.org/duneuro/brainstorm/duneuro-bst.git'