When I try to watch a livestream on Sportsnet Now, I get the “Sorry, we are unable to contact the service right now. Please try again later. (400210)” message. Replays work OK but no livestream. This doesn’t happen with Edge or Chrome so not a WIFi problem.
Happens every time I try to watch something.
Looks like you need to be in Canada to watch, so it won’t be trivial for me to test.
But I wonder if it could be a Shields setting (try disabling Shields on the site)? Or, maybe if it requires Widevine. Is the toggle for Widevine in Settings on or off? brave://settings/?search=widevine
You could try turning that on and see if it changes anything (and if not, turn it back off).