Error message white matter analysis tutorial

I am running through the WMA tutorial and get this error message at this step.

(base) MacBook-Pro-4:WMA_tutorial_data mariedrottar$ wm_separate_clusters_by_hemisphere.py ./FiberClustering/TransformedClusters/example-UKF-data/ ./FiberClustering/SeparatedClusters/

Importing whitematteranalysis package.

<wm_separate_clusters_by_hemisphere.py> Starting computation.

=====input directory ======

./FiberClustering/TransformedClusters/example-UKF-data/

=====output directory =====

./FiberClustering/SeparatedClusters/

==========================

<wm_separate_clusters_by_hemisphere.py> Input number of vtk/vtp files: 800

<wm_separate_clusters_by_hemisphere.py> Separating input file: ./FiberClustering/TransformedClusters/example-UKF-data/cluster_00001.vtp

Error: ./FiberClustering/TransformedClusters/example-UKF-data/cluster_00001.vtp has no hemisphere location infromation

Any thoughts on what is going wrong here/
thank you
Marie