Hello, 

I would like to ask how can i undo an error that i've made when configuring an event webpage. 

I changed the text of the Register button in an event webpage. Now whenever i click on that button i get a 400 error with the following message:

Traceback (most recent call last):
  File "/odoo/odoo-server/odoo/addons/base/models/ir_http.py", line 229, in _dispatch
    result = request.dispatch()
  File "/odoo/odoo-server/odoo/http.py", line 809, in dispatch
    r = self._call_function(**self.params)
  File "/odoo/odoo-server/odoo/http.py", line 318, in _call_function
    raise werkzeug.exceptions.BadRequest(msg % params)
werkzeug.exceptions.BadRequest: 400 Bad Request: <function WebsiteEventController.registration_new at 0x7f800d8d97b8>, /event/i-2020-07-06-3/registration/new: Function declared as capable of handling request of type 'json' but called with a request of type 'http'

I have replaced the original text (Register) but the same error appears. 

Regards.