Stuck: Challenge Log and GC Promotion

[nilh]

That message simply means that you haven't completed rank 1 of your GC hunting log yet.

To check which parts you still have to complete, open your hunting log (Logs > Hunting Log on the menu buttons, or pressing the default keybind for it, H)
In your hunting log, click on the GC symbol, below the class ones.

OMG I have never clicked the GC button! Duh!

Thanks everyone who replied!!!