Is it obligatory to inform the attendees when a mistake is made in reciting a Prophetic Hadeeth due to nervousness and the absence of diacritical marks?

The questioner is advised to avoid and turn away from the illusions of error in speech, for there is no accountability for error, as stated in the Almighty's saying: "And there is no blame upon you for that in which you have erred, but [only for] what your hearts intended." If the error becomes clear, the reading should be corrected immediately. If it does not become clear until later, it should be explained in another session or conveyed to whomever it can be conveyed, and there is no hardship in what cannot be accomplished.