What does the message “Invalid byte 2 of a 3-byte UTF-8 sequence” mean?

Question

I changed a file in Orbeon Forms, and the next time I load the page, I get an error message saying Invalid byte 2 of a 3-byte UTF-8 sequence. How can I solve this p

Answer 1

A three byte UTF-8 sequence looks like:

1110xxxx 10xxxxxx 10xxxxxx

Your error message may mean that the first byte of the three is incorrectly flagging the start of a three byte sequence or else that the second byte is malformed.

As @avernet says, you need to make sure that all elements in your system are producing and expecting UTF-8.