Bug: Loading models in engine tools causes crash

### Describe the bug

Attempting to load any model in the engine tools causes a game crash.

https://github.com/user-attachments/assets/1f2f3470-267f-436b-bb81-9143b94e3b55

### To Reproduce

1. Pass `-tools` to cmdline
2. Create a new actbusy document
3. Pick a model
4. Crash

### Issue Map

N/A

### Expected Behavior

Models should be loading correctly

### Operating System

_No response_