Obviously none of us, or anyone else has actually run graph theory from the canonical repository. This path is hardcoded and shouldn't be. Additionally, MDF_Parser.R called just after never made it into the public branch. I'll be addressing this in the shortly upcoming update to SPM12 release.
https://github.com/UMPsychMethodsCore/MethodsCore/blob/060cc87182f2d01492e0af996e395c164a21f8f0/GraphTheory/lib/cleanse.m#L8
Obviously none of us, or anyone else has actually run graph theory from the canonical repository. This path is hardcoded and shouldn't be. Additionally, MDF_Parser.R called just after never made it into the public branch. I'll be addressing this in the shortly upcoming update to SPM12 release.