500: Internal Server Error

Traceback

Traceback (most recent call last):
  File "/home/hilines/prjs/odoo13/odoo/addons/base/models/ir_http.py", line 229, in _dispatch
    result = request.dispatch()
  File "/home/hilines/prjs/odoo13/odoo/http.py", line 803, in dispatch
    r = self._call_function(**self.params)
  File "/home/hilines/prjs/odoo13/odoo/http.py", line 345, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/home/hilines/prjs/odoo13/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/home/hilines/prjs/odoo13/odoo/http.py", line 338, in checked_call
    result = self.endpoint(*a, **kw)
  File "/home/hilines/prjs/odoo13/odoo/http.py", line 909, in __call__
    return self.method(*args, **kw)
  File "/home/hilines/prjs/odoo13/odoo/http.py", line 510, in response_wrap
    response = f(*args, **kw)
  File "/home/hilines/prjs/odoo13/addons/website_blog/controllers/main.py", line 161, in blog
    values['main_object'] = blog
TypeError: 'Response' object does not support item assignment