Iam trying to install a new module in odoo but error occuring, AttributeError: 'str' object has no attribute 'setdefault'

Question

Odoo Server Error

Traceback (most recent call last): File "/home/ajay/PycharmProjects/odoo/odoo-14.0/odoo/addons/base/models/ir_http.py", line 237, in _disp