[BUG] FSRS Desired Retention Simulator (Help Me Decide) Crash

When a deck has the default FSRS parameters, the Help Me Decide simulator gets stuck on processing after hitting simulate, it then gives this error and debug info

Error: 404: Invalid path: _anki/latestProgress
Anki 26.05 (e64c6b1a) (ao)
Python 3.13.13 Qt 6.11.0 PyQt 6.11.0
Platform: Windows-11-10.0.26200-SP0

Traceback (most recent call last):
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\progress.py", line 121, in handler
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\main.py", line 1578, in on_periodic_backup_timer
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\main.py", line 1629, in create_backup_with_progress
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\operations_init.py", line 263, in run_in_background
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\operations_init_.py", line 281, in _run
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\taskman.py", line 113, in with_progress
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\taskman.py", line 71, in run_in_background
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\taskman.py", line 148, in on_closures_pending
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\taskman.py", line 88, in 
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\operations_init.py", line 259, in wrapped_done
File "concurrent\futures_base.py", line 449, in result
File "concurrent\futures_base.py", line 401, in _get_result
File "concurrent\futures\thread.py", line 59, in run
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\operations_init.py", line 243, in wrapped_op
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\aqt\deckbrowser.py", line 163, in get_data
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\anki\scheduler\base.py", line 79, in deck_due_tree
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\anki_backend_generated.py", line 386, in deck_tree
File "D:\a\anki\anki\out\installer\build\anki\windows\app\src\app_packages\anki_backend.py", line 162, in _run_command
pyo3_runtime.PanicException: called Result::unwrap() on an Err value: PoisonError { .. }