I know it is stupid but it is suitable for my case. I have an ad hoc project which is a web app. It is very tiny.
All text typed in string format with UTF-8 may not display correctly. Therefore we may replace them with the correct strings in the file "app.js" by text editor.
After you build the project. you could see error strings like:
change to to correct string:
Since my project just have 10 strings, it is stupid but works...
It tells us the whole project has no errors in the build process. So the problem may caused by something like the minify engine...