Almost every function that is used sends a warning that says ‘argument #1 expects a string, but [number/userdata/string/etc] was passed’. Ends up sending potentially thousands of warnings in the output, making debugging harder.
Confirmed happening to at least 3 people including me in the past two hours.
By the sounds it of you have to FindFirstChild(tostring(StuffGoesHere)) for all FindFirstChild’s that are grabbing a value or whatever now. It is gonna be a pain to convert but oh well :/.