Moment-helper moFormat is not working


Hi there, im trying to setup a clock on my website, and I saw the moment-helpers package, so installed the moment + the moment helpers one, when i use moment(); in the console, it shows the correct date and time, when i add {{moNow}} there is no problem either, problem is when I use {{moFormat moNow ‘HH:mm:ss’}}, nothing shows up! Am i missing something?
Also, how can I debug those kind of problems? I see myself searching a lot and then asking questions on forums etc because I can’t seem to know the problem, most of the times for stupid things… lol
Thanks guys!