See this topic: https://devforum.roblox.com/t/roblox-player-isnt-opening-games/87936
Clicking the play/edit buttons will open the ‘Roblox is now loading, get ready to play!’ (or studio alternative) screen. It’ll do what it usually does, and then usualT download and install Roblox popup appears.
However, on my PC’s end, nothing happens. The Roblox processes don’t appear in the task manager.
This is occuring for others (see the topic above if you haven’t already), and me. It’s occuring for me on both my Windows 7 and Windows 10 PCs. My younger brother, who I was trying to play with, could play Roblox fine.
This issue first occured for me on Sunday 4th (NZST) when I got up and tried to play a Roblox game, which means it probably occured sometime during the early hours of Saturday (EST) and ~3pm (the former’s roughly when I last played a Roblox game).
TThis has always opened for me on all the different PCs I have used (another bug report needed?) when playing a game.