[Error] Error when trainer battle starts.

[MoonlightRose]

[Pokémon Essentials version 19.1]
[v19.1 Hotfixes 1.0.7]

Exception: RuntimeError
Message: Script error in event 7 (coords 10,12), map 123 (Cerulean City Gym):
Exception: NameError
Message: uninitialized constant Interpreter::PBTrainers

***Full script:
pbTrainerBattle(PBTrainers::SWIMMER_M,"LUIS")

Backtrace:
(eval):1:in `execute_script'
033:Interpreter:137:in `eval'
033:Interpreter:137:in `execute_script'
034:Interpreter_Commands:352:in `command_111'
034:Interpreter_Commands:29:in `execute_command'
033:Interpreter:127:in `block in update'
033:Interpreter:87:in `loop'
033:Interpreter:87:in `update'
032:Scene_Map:157:in `block in update'
032:Scene_Map:155:in `loop'


Backtrace:
033:Interpreter:189:in `rescue in execute_script'
033:Interpreter:135:in `execute_script'
034:Interpreter_Commands:352:in `command_111'
034:Interpreter_Commands:29:in `execute_command'
033:Interpreter:127:in `block in update'
033:Interpreter:87:in `loop'
033:Interpreter:87:in `update'
032:Scene_Map:157:in `block in update'
032:Scene_Map:155:in `loop'
032:Scene_Map:155:in `update'

Error pops up when it tries to go into the actual battle, thought it was because it was trying to start a battle with a trainer that didn't exist but when I added a Swimmer M called Luis to trainers, it didn't fix it.

 

[MoonlightRose]

In case someone else has this issue : The problem was me bringing in the maps and thus th eevent scripts from an older version of Essentials. The problem was the PBTrainers: in the event.