Comment (by Peter Diener):

After a bit of investigation it appears that the schedule.ccl file for ML_BSSN contains erroneous read declarations for the stress energy tensor from TmunuBase. Tmunu is not necessary for converting from BSSN to ADM variables. I believe this is generated by Kranc. I still tried to comment out these read declarations and rerun and found agreement to within roundoff errors with the gallery files. I will open a separate ticket for this issue.

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Ticket URL: https://bitbucket.org/einsteintoolkit/tickets/issues/2175/test-single-stable-neutron-star-example