[Error] Crash when looking at pokedex

[DinoWrecks]

Hello!
I ran into a problem that crashes my game. For my game, I require 3 Regional Pokédexes. To test out if it works, I put Bulbasaur in the first Regional Pokédex, Ivysaur in the second one, and Venusaur in the third one.

The first two work completely fine. The third regional Dex, however, works fine in the list, but when pressing Z to view Venusaur's information, the game crashes. Sometimes it doesn't but sometimes it does. At firs I thought it was because it didn't have a Regional Map, so I just copied one of the 2 Regional Maps in the folder and renamed it. Yet it still crashes. Here is the crash:

[Pokémon Essentials version 19.1]
[Generation 8 Project v1.1.0]
[EBDX v1.2.5]

Exception: NoMethodError
Message: undefined method `[]' for nil:NilClass

Backtrace:
272:UI_Pokedex_Entry:26:in `pbStartScene'
272:UI_Pokedex_Entry:554:in `pbStartScreen'
271:UI_Pokedex_Main:808:in `pbDexEntry'
271:UI_Pokedex_Main:1177:in `block (2 levels) in pbPokedex'
271:UI_Pokedex_Main:1152:in `loop'
271:UI_Pokedex_Main:1152:in `block in pbPokedex'
080:MessageConfig:700:in `pbActivateWindow'
271:UI_Pokedex_Main:1151:in `pbPokedex'
271:UI_Pokedex_Main:1195:in `pbStartScreen'
270:UI_Pokedex_Menu:118:in `block (2 levels) in pbStartScreen'

Hopefully you can help me. Thanks in advance.