Hi, I deleted my GMail account since it was acting up quite a bit (for example, in system preferences I couldn't tick or untick anything -it was blank- and I couldn't add or delete accounts). I deleted it from Mail, iCal, etc individually, tried to add the account back, got the issue in the video attached, so then deleted some .plists (basically all that matched a search for ical, address book, mail or sync in ~/Library/Preferences), rebooted and still the same.
P.S.: I tried a couple times and I'm sure I wrote my email and password correctly, I even tried changing the name.
P.S.: I tried a couple times and I'm sure I wrote my email and password correctly, I even tried changing the name.