When trying to sync a GitLab group containing a project without repository (for example, a project containing only a Wiki),
then the (initial) synchronisation process fails with:
Une erreur s'est produite en liant le groupe sélectionné et en synchronisant ses dépôts : Bad Request: Some keys are missing in the project Json. This is not expected. Aborting.
Such project should be ignored by Tuleap.
Note: the current GitLab API does not allow to select project « with repository »