How to disable 'Your connection is not private'

[JimB1]

Privacy Error - Let’sEncrypt DST Root CA X3 Expiration Issue

Technically it isn’t ‘Brave’ breaking things, it’s a consequence of using outdated software and not updating it. There is a workaround in this thread: NET::ERR_CERT_DATE_INVALID Error on All Sites If you update your root certificates per the advice in that thread then you should be able to get past it (until next time there’s a major certificate authority expiry).

Make sure to also follow the next link from there, it is to another thread that has a workaround.