Same old same old 
You have not selected a valid instance of WoW to attach to!
Please restart Honorbuddy and choose a valid instance of WoW to use Honorbuddy with!
This version of Honorbuddy only supports WoW Build #15211
You are currently on build #15211
Currently tried: Redownload HB with a new fresh profile, repaired WoW.
Any ideas ?
Regards

You have not selected a valid instance of WoW to attach to!
Please restart Honorbuddy and choose a valid instance of WoW to use Honorbuddy with!
This version of Honorbuddy only supports WoW Build #15211
You are currently on build #15211
Currently tried: Redownload HB with a new fresh profile, repaired WoW.
Any ideas ?
Regards