I’ve just encountered this issue, and every forum post addressing a " Requested module experienced an error while loading - Client" error doesn’t go over my case.
So, when I try to test my game with the Roblox studio multiplayer test option, the game works fine, it goes into the server, and the different client windows, but, an error " Requested module experienced an error while loading - Client " appears in the output.
Roblox Ui randomly breaks for no reasons it also happens to me.
try making a new test or restart your studio. if none of theses worked try making a BUG report with the error or try re-installing studio!
This is just a Roblox isusse, if it’s not messing with anything then it’s fine and Roblox will fix it over time, I team-test and I don’t get this anymore.