How to show error on code?

Hi my komodo don’t show error when miss on code.

Former when i code and missing some thing it will show a red underline on my code , but now it show no thing, how to fix this ? Thanks !

For HTML and HMTL5 you can set the error level to “errors and warnings”, default it’s showing “only warnings”,
you can adjust this by going to preferences > Syntax Checking