Text to speech is not working in Studio when it used to work, you just get Failed to load sound : InvalidUser and no audio plays.
The error occurs even when using the sample experience linked in the documentation: Gingerbread House - Text-to-Speech | Play on Roblox
It does work as expected ingame.
Expected behavior
I expect the sample place demonstrating the feature to work in Studio. It worked in the past so I believe this is a regression and not intentional behavior.