what do i need to do?

[Otskar]

We couldn't find a free WoW process to attach. There are 64bit version(s) of WoW running. Please make sure you use Honorbuddy Launcher to launch the game before starting honorbuddy.

i do run the game through application app, so idk.

 

[Tony]

Run wow under 32 bit

More info here:

Honorbuddy:HelpDesk:Launching a 32-bit WoWclient​