The code verifier, associated with your login request, could not be found. Please try logging in again.
For win/mac:
If clicking add account and going through the login process a second time results in the same error, please try restarting your launcher and run through it once more. Also make sure you’re running the latest application (1456374 or greater).
If your launcher application is not prompting you with updates, or fails to update, you may get the latest version here: Download the free EVE Online client (launcher) for Windows or Mac
For linux users…
Since we don’t have official support for Linux, the launcher backend may not yet have been updated on release. Switching to beta, and receiving the launcher app update there, should solve the issue for the time being.