[Question] Error when I do the pbTrainerBattle script, when I start the battle it crashes. Help me.

If I start a trainer battle, this happens

[Pokémon Essentials version 17.2]
Exception: RuntimeError
Message: Script error within event 4 (coords 27,19), map 43 (Route 24: Twinmoon Falls):
Exception: NameError
Message: (eval):1:in `pbExecuteScript'uninitialized constant Interpreter::POKEMONTRAINER_MAY
***Full script:
pbTrainerBattle(POKEMONTRAINER_MAY,"Erina",_I("That battle was frickin awesome!"),false,0)

Interpreter:243:in `pbExecuteScript'
Interpreter:1606:in `eval'
Interpreter:243:in `pbExecuteScript'
Interpreter:1606:in `command_355'
Interpreter:494:in `execute_command'
Interpreter:193:in `update'
Interpreter:106:in `loop'
Interpreter:198:in `update'
Scene_Map:163:in `update'
Scene_Map:161:in `loop'

Interpreter:276:in `pbExecuteScript'
Interpreter:1606:in `command_355'
Interpreter:494:in `execute_command'
Interpreter:193:in `update'
Interpreter:106:in `loop'
Interpreter:198:in `update'
Scene_Map:163:in `update'
Scene_Map:161:in `loop'
Scene_Map:170:in `update'
Scene_Map:234:in `main'

I just used the script
The trainer type is in the pbs file but edited the POKEMONTRAINER_May trainer type (I just changed the name and made the May to all caps)
The trainer is in the trainers pbs file and no syntax errors are found

See here:
#-------------------------------
POKEMONTRAINER_MAY
Erina
1
BAGON,5,,RAGE,BITE,,,,F

Does anyone know a solution and the one who can help will be credited on my fangame. I keep asking error questions since I'm an newbie in making videogames.

Thanks in Advance!

Sorry I just forgot to add a colon before the trainer type!