Yeah, seems exactly like the thing i’ve been telling everyong for a week now.
You have multiple Google accounts on your default system browser and possibly multiple Google accounts in your macs Settings > Accounts.
Set it to one google account in your mac settings / accounts, and set your default system browser to one google account and set your antigravity to one google account. all have to be the same matching account.
i detail the whole thing
https://discuss.ai.google.dev/t/possible-global-quota-refresh-reboot-restart-antigravity-and-check-looping-7-day-lockouts-over