I continue to have the same issue. I tried logging in during the DDoS attack and have not been able to log on since. I have tried re-installing the launcher, fixing permissions and verifying the shared cache. Notably I can log on to account management, and my Mac laptop can play just fine.
https://i.imgur.com/Dklyplq.png
Any other ideas?
Edit: I have been able to log in thanks to this thread: https://forums.eveonline.com/t/tranquility-fail-singularity-ok/71657
I deleted the folders cache and QtWebEngine from the %LOCALAPPDATA%\CCP\Eve folder. I am able to log in once again.