If you see an error, check to see if the tags are correct in an online validator.
Make sure that:
- The text is located inside the required <speak> ... </speak> tag.
- All characters within the tag are correct.
- If it is a paired tag, it has a closing tag. For example, <speak><prosody rate="75%">Hello! How are you?</prosody></speak>
- If the tag is single, there is a "/" at the end. For example, <break time="500ms"/>