You forgot to enter a filename for the Welcome panel's HTML file.

Message
You opted to use an HTML file for the Welcome panel, but you forgot to enter a filename.

 

Comments
JExpress can automatically generate a Welcome panel with your product name, copyright, etc. that you enter on the Welcome panel. Or, you can create an HTML file which JExpress displays when the installer starts.

 

If you select showing an HTML file, then you must enter a filename and the file must be present when JExpress builds the installer.