Gmail won't load. I receive Gmail Temporary Error Numeric Code: 2

[Philligl]

Description of the issue:
I have 3 separate Gmail accounts. 1 of them is working. I receive Temporary Error messages on the other two.

Everything is working fine in Chrome. I can’t tell whether this is a problem with Brave or a problem on Google’s end.

Steps to Reproduce (add as many as necessary): 1. 2. 3.
These accounts are included in my startup configuration. They launch automatically, and have for as long as I have used Brave. I have signed out of all my Google accounts and relaunched these, with no success.
Actual Result (gifs and screenshots are welcome!):

Expected result:
Historically, each account opens in its own tab, as usual.
Reproduces how often:
Ongoing.

Operating System and Brave Version(See the About Brave page in the main menu):
Mac OS Sequoia 15.5
Brave is up to date

Brave 1.80.120 (Official Build) (arm64)

Chromium: 138.0.7204.101

Additional Information:

[Mattches]

Have you tried logging out, clearing cache/site data for mail.google.com and then testing again? Additionally, I’d be interested to know if you are able to login and view gmail normally if you were to login using a Guest window (Menu --> More tools --> Guest window)?

[Philligl]

I tried More Tools → Open Guest Window. That worked. Next steps, to get it to work in a regular window?

[Philligl]

I just cleared data. Problem solved.