Looking for logging into the Web Oauth_error 2 site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Web Oauth_error 2 site. After that you can login as usual with your login credentials.
https://www.odoo.com/forum/help-1/question/how-to-work-around-oauth-error-3-on-login-56594
https://github.com/buguelos/odoo/blob/master/addons/auth_oauth/controllers/main.py
https://framagit.org/framasoft/OCB/blob/60af7cac02fc7e74510fc988367832b631d00196/addons/auth_oauth/controllers/main.py
https://www.aqua-mail.com/forum/index.php?topic=5463.0
http://www.gambio.de/forum/threads/rest-api-meldet-401-unauthorized-trotz-korrektem-login.26932/
https://phabricator.wikimedia.org/T136114
https://books.google.de/books?id=f31MDAAAQBAJ&pg=PA84&lpg=PA84&dq=web+login+oauth_error+2
https://www.drupal.org/project/slack_to_drupal/issues/2756919
https://api.slack.com/docs/oauth
https://developer.amazon.com/docs/login-with-amazon/authorization-code-grant.html