That would be my fault, since I was that one that modified the training script to accommodate @Stormie97's robes. The issue is that the mod changes the default fake PC that is used for two custom ones (male and female), and, naturally, there is no provision to properly destroy those once they have fulfilled their purpose. An unfortunate oversight on my part. As luck would have it, the script that controls destroying the fake PC can't be decompiled, so resolving that will take a different approach. I've suggested a fix to Stormie to resolve the problem for future users. But fixing that wouldn't help in your case regardless, since the scene has already been completed. As a temporary measure, try extracting the attached into your Override folder and loading a save in the Hawk (or re-entering it from outside).
Stormie_Robes_Fake_PC_Temp_Fix.zip