Troubleshooting 404 errors on CircleCI

I get a 404 trying to log in

Make sure that cookies, extensions or other browser issues aren’t causing a problem.

An easy way to test this is to open a private tab / incognito window, log into GitHub / Bitbucket and then log into CircleCI.

Another option is to log out of CircleCI and GitHub / Bitbucket. Then delete cookies for both the CircleCI and GitHub domains (instructions for deleting cookies: Chrome, Firefox, Safari). Now log back into GitHub / Bitbucket and then try CircleCI again.

I get a 404 trying to view a project

If you do not have permission to view a project or if you are not following a project, clicking a direct link will give a 404. To follow the project you were trying to get to, got to:

https://circleci.com/add-projects