I downloaded your folder, created a new subject, right-clicked > Import anatomy folder, then clicked on "Compute MNI transformation" when the MRI viewer shows up.
The rest of the import works correctly, I could not reproduce your bug.
(the computation of the high-resolution interpolations is extremely slow, hopefully we'll work on optimizing this some day, but it works)
Make sure you use the latest versions of SPM12 (type "spm_update") and CAT12 (download it from the website).
Also, make sure you don't have other toolbox in your Matlab path, which could shadow some of the Brainstorm or SPM functions.
Which version of Matlab are you using? On which operating system?
(you can copy-paste what you get when type "ver" in the Matlab command window)