Support for RWTHjupyter is provided on a best-effort basis by the RWTH Jupyter user-group. Please note that it is not yet provided as an official service by the RWTH IT Center.
You can contact the group via its mailing list: firstname.lastname@example.org. A subscription to this list is possible via the following link: https://lists.rwth-aachen.de/postorius/lists/jupyter.lists.rwth-aachen.de/
You can also contact the administrators of the cluster via a dedicated closed list: email@example.com.