Apple Help is an incredibly frustrating and time wasting help system. The main reason is its absolute lack of assistance when something doesn't work. No console messages, no message in the help viewer. You're just constantly faced with the same identical error page that the "Content isn't available at this time".
1. In AW4, you can right click the wrapped application and get AW to move it to the Applications folder and open it for you.
In the terminal, enter in the following command and press "Enter" or "Return" to execute it.
hiutil -P
In the Terminal, enter in the following command and press "space", then drag your helpindex in to the terminal window, let go and press "Enter" or "Return" to execute it.
hiutil -I corespotlight -Af
Yup, I spent almost a whole day fighting Apple Help to get away from the frustrating "Content not available message", when all I needed to do was to restart the machine.