SH2002: A text file isn't valid UTF-8

Class: content, exit code 1.

A file read by a text format holds bytes that aren't UTF-8 text: it was saved in another encoding (Latin-1, UTF-16), or a binary file was given a text file's name.

How to fix it. Save the file as UTF-8 text in its editor, or give a binary file the extension of its own format.

For example:

files/names.ron: error[SH2002]: file is not valid UTF-8