[Error] Error with argument

[midorimaaaaaa]

I got this error, can anyone solve that issue and explain to me please ?

[Pokémon Essentials version 20]

Exception: ArgumentError
Message: Invalid argument passed to method.
Expected nil to be one of [Symbol, GameData::TrainerType, String], but got NilClass.

Backtrace:
015:Validation:29:in `validate'
103:GameData:92:in `get'
270:Trainer:48:in `male?'
289:UI_Load:78:in `refresh'
289:UI_Load:26:in `initialize'
289:UI_Load:109:in `new'
289:UI_Load:109:in `block in pbStartScene'
289:UI_Load:108:in `times'
289:UI_Load:108:in `pbStartScene'
289:UI_Load:301:in `pbStartLoadScreen'

 

[midorimaaaaaa]

I know it's from the intro scene, but idk how to solve it.

 

[animositee]

I know it's from the intro scene, but idk how to solve it.

Copy the player_metadata.dat file from the Data folder in a vanilla Pokemon Essentials v20 folder to your Data folder. Replace if needed. Player sprite information is now stored in this file. It will probably need to be copied over in future versions of Pokemon Essentials as well.

Edit: After each time that you compile your game, you will need to close out of the game, but not RPG Maker. Then re-copy the file from a vanilla Pokemon Essentials v20. This seems like a temporary fix and a better one will either be added to hotfixes or here.