[Other] Error Please Help!

[Icedvirus]

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Pokemon Seven Wonders
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[Pokémon Essentials version 17]

Exception: NoMethodError

Message: undefined method `name' for nil:NilClass

PField_Field:408

PField_Field:402:in `call'

EventHandlers:54:in `trigger'

EventHandlers:49:in `each'

EventHandlers:49:in `trigger'

MapFactory:254:in `setMapChanging'

MapFactory:124:in `setup'

PScreen_Load:360:in `pbStartLoadScreen'

PScreen_Load:331:in `open'

PScreen_Load:331:in `pbStartLoadScreen'



This exception was logged in

C:\Users\w7\Saved Games\Pokemon Seven Wonders\errorlog.txt.

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OK
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I get this error whenever I playtest the game! Please help!