If Roblox Marketplace is not working or loading and you see If you are having trouble loading Marketplace message, then see this post.

For some Roblox players, voice chat is absolutely essential. Here's how to fix voice if it's not working in the Windows version of the game.

If you are asked to continue installation without flag settings in Roblox, first clean Roblox App Data and see if it helps. More fixes here.