I had the same problem. Try this, it works fine for me:
First of all, enable in Settings of WoW the "Windowed Mode" and then close again.
Now start Honorbuddy as usual and login to World of Warcraft.
After entering with your Char, go back to Honorbuddy and press "Login"-Buton.
---> Now switch as fast as you can to World of Warcraft and start moving your character for 20-30 seconds.
Now open Honorbuddy and you will see it works.
Tell me if this works for you
Regards <3