DoctorRofatnik, known to fans as “Doc,” looked almost mayoral in a tall white hat, a red tie and an American flag pin. A smirk was permanently plastered on his face as he roamed his domain on Roblox, ...

On DownDetector, a website that tracks online outages, users reported issues with Snapchat, Roblox, Fortnite, online broker Robinhood, the McDonald’s app and many other services.

Roblox can’t keep up. After years of criticism that its platform isn’t safe for the young gamers it caters to, the multibillion-dollar company announced in July that it was rolling out new measures to ...