[Error] BW Gender Selector v2.2 pbGenderSelector Error

[nadarut94]

Hi all, I'm fairly new to pokemon essentials and have tried importing this plugin for the below error message to appear. I have copied all of the files in, any help would be appreciated.

[Pokémon Essentials version 19.1]
[Generation 8 Project v1.1.2]

Exception: RuntimeError
Message: Script error in event 1 (coords 0,0), map 1 (Intro):
Exception: NameError
Message: undefined local variable or method `pbGenderSelector' for #<Interpreter @event_id: 1>

***Full script:
pbGenderSelector


Backtrace:
(eval):1:in `execute_script'
033:Interpreter:140:in `eval'
033:Interpreter:140:in `execute_script'
034:Interpreter_Commands:1030:in `command_355'
034:Interpreter_Commands:116:in `execute_command'
033:Interpreter:130: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:192:in `rescue in execute_script'
033:Interpreter:138:in `execute_script'
034:Interpreter_Commands:1030:in `command_355'
034:Interpreter_Commands:116:in `execute_command'
033:Interpreter:130: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'