Suddenly can't sign in to Google or Youtube with Brave - "This browser or app may not be secure."

Description of the issue:
Suddenly can’t sign in to Google or Youtube with Brave - “This browser or app may not be secure.” Error. Tried clearing cache and site data, removing protections, no success. Using Windows 10.

Brave is up to date
Version 1.68.141 Chromium: 127.0.6533.120 (Official Build) (64-bit)

I got the same today on my Windows laptop. It is still logged in OK on my Linux desktop with Brave. Very odd. I’ve tried disabling Shields, having Shields on but with options disabled, installing a user agent extension and setting to Chrome. Nothing working so far. I’m still only about 80% migrated to Proton Mail so still need this Google access.

Solution for me: OK got it to login using a private window session. Went back and deleted cookies, cache, etc. Closed tab, and reopened Brave, and managed to then login OK. It did take about two or three tries so I needed to persist with the cache and cookie deletion. But in now.

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