First, the games tonight are still planned to continue and start, unlike what the article says. The tweet it links says suspension happens starting tomorrow.
Edit: Refs just left the court in Sacramento. Game will be actually postponed, so I suppose that article is correct about that now.
Gobert is the guy who was tested positive, and as shown in a different comment, did the ridiculous joke of touching mics and recorders after press conference.
The part about what happened is correct, but more interesting than their brief statement. Starters were on the middle of the court maybe 10 seconds before tip off, when a medical staff "rushed" onto the court, https://streamable.com/g4evt, talked to the refs, and the players were taken off. Currently, possibly still, they're in the locker rooms waiting to be tested since Gobert was already tested.
I find this whole thing incredibly interesting because I follow so many sports. The way it was broadcast on ESPN during their first Wednesday game where they cut away to interviews, the way /r/nba reacted with the tweets from Woj, and also what this'll mean for other sports.