Most recent user affected CL: 2978217
CrashReporter User Descriptions:
1. Create a Third Person Template project
2. Create a montage from the Mannequin skeleton
3. Open montage in Persona.
4. Create one section from ThirdPesonIdle animation
5. Click on the section
6. Under details, you'll see Animation Reference
7. Select the montage in the Content Browser
8. Hit "Use Selected Asset From Content Browser" for the Animation Reference
Expected: It doesn't accept the anim montage, but doesn't crash
Head over to the existingAnswerHub thread and let us know what's up.