[Error] Partner Trainer

The game runs fine and same goe for defining a partner trainer. However, whenever I walk left or right, this error appears.

[DIV][Pokémon Essentials version 17.2]
Exception: SystemStackError
Message: stack level too deep
PField_Field:318
PField_Field:317:in `each'
PField_Field:317
PField_Field:312:in `call'
EventHandlers:54:in `trigger'
EventHandlers:49:in `each'
EventHandlers:49:in `trigger'
Game_Character:278:in `update_move'
Game_Character:227:in `update'
Game_Event:238:in `update'[/DIV]

Ok... I don't know how, but I managed to fix it...