Problem with MK Project MUGEN

[Guest450]

Error detected.

Can't open stage: stages/MK2/kahn's_aren_boss.def

Clipboard tail:
Match RNG closed
Game loop deinit
Gameflow 12
Entering victory screen.
Gameflow 8
Char goro.def (28) unreserve pal 11 FFF 7FF -> FFF
Char shao_kahn.def (23) request pal 5 FFF (FFE) -> reserved 5 (FDE)
Gameflow 9
Gameflow 10
Entering versus screen.
Unloading match assets
Freeing players
Unloading stage...OK
Game loop init
Versus screen init
End of versus screen loop
Game loop deinit
Gameflow 11
Loading match assets...
Loading stage...

if someone knows how to fix this error pls let me know