hi,
I had the same problem. Solution came from EVE support center as follow:
Thank you for contacting us regarding your issue.
This is most likely caused by the cookies file of the launcher.
Please try the steps described on https://support.eveonline.com/hc/en-us/articles/360002928779-Unable-to-Log-Into-Account-or-Update-Launcher to resolve your issue.
- Press and hold the Windows key on your keyboard while pressing R (this will open a run window).
- Copy and paste the following line into the run window: %LOCALAPPDATA%\CCP\EVE\
- You should see a few folders there. One should be named QtWebEngine
- Open that folder. Then open Default.
- Delete the two of the files in there. Cookies and Cookies-journal.
- Try logging in again.