Hmm could be a error in the action Folder too
Maybe 1 of the rider csv Files
make sure you added these Files in your list.csv files:
rider\ALO0.csv
rider\ALO1.csv
rider\ALO2.csv
rider\ALO3.csv
rider\ALO4.csv
rider\ALO5.csv
rider\ALO6.csv
rider\ALO7.csv
The Files are in /share/action/rider/
The Riding Animations are written in these .csv Files