Retarget Export Crashes Everytime for UE5 to ALS Character

My objective is to import an animation pack and retarget them for a custom charater that is already retarged to the Advanced Locomotion System. The custom character is working great using the ALS rigging.
First, I retarged the animations UE4 to UE5. Now, I’m taking those new animations and trying to retarget them from the UE5 to ALS character. It allows me to dial in the animations using the Edit Pose feature. But when I try to export them - whether one or all 20 - the system crashes.

Can someone help me troubleshoot this?