[Error] I REALLY NEED HELP WITH AN ERROR THAT I DON'T UNDERSTAND.

[ZimbabweToes]

So I am making a game with essentials v17.2 and EBS but I came across an error.
When a Pokémon gets xp, this error pops up.

[Pokémon Essentials version 17.2]
Exception: NameError
Message: uninitialized constant PokeBattle_SceneConstants::EXPGAUGESIZE
[EBS4] EliteBattle_1:729:in `pbEXPBar'
PokeBattle_Battle:1964:in `pbGainExpOne'
PokeBattle_Battle:1958:in `loop'
PokeBattle_Battle:1995:in `pbGainExpOne'
PokeBattle_Battle:1808:in `pbGainEXP'
PokeBattle_Battle:1802:in `each'
PokeBattle_Battle:1802:in `pbGainEXP'
PokeBattle_Battle:1773:in `each'
PokeBattle_Battle:1773:in `pbGainEXP'
PokeBattle_Battler:3255:in `pbUseMove_ebs'

And then when I click okay, there is an other one that pops up.

[Pokémon Essentials version 17.2]
Exception: NoMethodError
Message: undefined method `dispose' for nil:NilClass
[EBS4] EliteBattle_1:45:in `pbDisposeSprites'
PokeBattle_Scene:2088:in `pbEndBattle'
PokeBattle_Battle:4022:in `pbEndOfBattle'
[EBS4] EliteBattle_0:238:in `pbStartBattleCore'
PokeBattle_Battle:2340:in `pbStartBattle'
PField_Battles:98:in `pbWildBattle_ebs'
PField_Battles:97:in `pbSceneStandby'
PField_Battles:99:in `pbWildBattle_ebs'
PField_Battles:96:in `pbBattleAnimation'
PField_Battles:96:in `pbWildBattle_ebs'


Plz I really need help I am new to game development and I don't wanna start over.

Thank you for looking into this and helping me.

 

[भाग्य ज्योति]

In module PokeBattle_SceneConstants of EliteBattle_3, do you have any constant like EXPGAUGESIZE. If no, you altered the scripts, if yes, its value must be 260.