Error 400 when logging in to google/gmail

[Mattches]

Hello,
I’m wondering if anyone here experiencing this can run this test to see if it resolves the issue:

Last Brave update killed Gmail

Also try brave with the following --disable-features=PartitionConnectionsByNetworkIsolationKey,PartitionExpectCTStateByNetworkIsolationKey,PartitionHttpServerPropertiesByNetworkIsolationKey,PartitionSSLSessionsByNetworkIsolationKey,SplitHostCacheByNetworkIsolationKey (Brave, rightclick, properties) add in the Target