Add New Party Type

[kanuns]

Hello Again,

I have manually fresh installed and I still cannot see the New button in the party type list.
Anyhow please check the following error, it arises when I try to import the data via the data import list.
And I installed from the following link:

Guide: Manual Install ERPNext on Ubuntu 17.xx & 18.xx

Setup Supervisor & Nginx for Production By default, the ERPNext application listens on port 8000, not the standard HTTP port 80. Also, running the built in web server for production use is not recommended as we will be exposing the server to the world. You should use a production web server as a reverse proxy such as Apache or Nginx. We will use Nginx as a reverse proxy as it can be automatically configured using Bench. Bench can automatically generate and install the configuration according to …

Traceback (most recent call last):
  File "/opt/bench/erpnext/apps/frappe/frappe/app.py", line 60, in application
    response = frappe.api.handle()
  File "/opt/bench/erpnext/apps/frappe/frappe/api.py", line 39, in handle
    validate_oauth()
  File "/opt/bench/erpnext/apps/frappe/frappe/api.py", line 134, in validate_oauth
    from frappe.oauth import get_url_delimiter
  File "/opt/bench/erpnext/apps/frappe/frappe/oauth.py", line 8, in 
    from oauthlib.oauth2.rfc6749.grant_types import AuthorizationCodeGrant, ImplicitGrant, ResourceOwnerPasswordCredentialsGrant, ClientCredentialsGrant,  RefreshTokenGrant, OpenIDConnectAuthCode
ImportError: cannot import name OpenIDConnectAuthCode

The version it had installed is as follows:
ERPNext: v12.x.x-develop () (develop)
Frappe Framework: v12.x.x-develop () (develop)