Cannot get Group of K for space group 166

Hello,

My issue might be related to this Q&A post. I am attempting to find the star of some wavevectors in the space group 166. It seems like I am getting the same issue as seen in the other post:

“`

Needs[“GroupTheory`”]
basis = {{a/2, -((Sqrt[3] a)/2), c/3}, {a/2, (Sqrt[3] a)/2, c/3}, {-a,
0, c/3}};
recbas = GTReciprocalBasis[basis];
grp = GTInstallGroup[166];
GTGroupOfK[grp, {0, 0.5, 0}, recbas ]

“`

Output

“`

Error: Input is not a group!

“`

Is there a way to resolve this?