@longnguyenQB you need to share me the action logs for your error, open a second terminal run rasa run actions
and in first terminal run rasa, and performed the same scenario and share me the both terminal error screenshot. I’m setting a reminder for you 
@longnguyenQB you can even used this syntax for fetching the xls file, and I will suggest save the file in .csv format rather .xlxs on
Just a demo code for your ref:
class ActionSearchExits(Action):
def __init__(self):
self.faq_data = pd.read_csv('./data/Tuyensinh.csv')
def name(self) -> Text:
return "action_search_exits"
PS: can be a issue of data frame, I am not sure!
@longnguyenQB Even check you FB secret key or I will suggest just rasa and check with rasa shell the complete code.