Fixing an Error Code 528 on the Microbit
This website tells you where to find the default meet the Microbit code / program. https://microbit.org/get-started/user-guide/meet-the-microbit-program/#:~:text=When%20you%20first%20unbox%20and,features%20in%20a%20playful%20way.&text=micro%3Abits%20manufactured%20before%20June,Out%20of%20box%20experience’).
This website tells you how to put the .hex Meet the Microbit file onto your Microbit. https://microbit.org/get-started/user-guide/transfer-code-to-the-microbit/