[Error] This crash happens whenever I try entering this Pokemon Gym. What's going wrong?

[SuperSpyroDragon64]

I copypasted a warp, and changed the warp so it points towards the interior of this new Flying-Type Pokemon Gym (the second one). But every time I make the player character enter this warp, I get this error. The warp works just fine when I make it take me to any other map. It's just this one with the error, and I don't know what's causing it. The warp is sending you onto appropriate ground you can walk around on, not inside a wall (i checked) so what's causing this?

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Pokemon Essentials
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[Pokémon Essentials version 17.2]

Exception: NoMethodError

Message: undefined method `*' for nil:NilClass

Game_Character:202:in `screen_z'

Sprite_Character:154:in `shadow_update'

Sprite_DynamicShadows:164:in `update_or'

Tilemap_Perspective:436:in `update'

Sprite_Character:44:in `shadow_initialize'

Sprite_DynamicShadows:141:in `perspectivetilemap_initialize'

Tilemap_Perspective:430:in `initialize'

Spriteset_Map:64:in `new'

Spriteset_Map:64:in `_animationSprite_initialize'

Spriteset_Map:63:in `each'



This exception was logged in 

C:\Users\MYNAME\Saved Games\Pokemon Essentials\errorlog.txt.

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OK   
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[SuperSpyroDragon64]

update: Tried copypasting the map and seeing if I can be warped to the map's copy. Nope.

 

[Same-Same]

im just guessing but, was there an animation or event that was supposed to run, but it got deleted or changed name in the graphics folder?