Not sure about failied but I would think that HB is down because of the new patch.
DONT quote me on this but I would check with others about down time.
I get failed sometimes and just reboot HB and it works fine.
I can't log into HB. Already restart HB, reboot computer 2 times. This is the message I got after the patch.
Loading Honorbuddy 2.0.0.3956 settings.
Authenticating..
Gatherbuddy Sessions: 0/0
Honorbuddy Sessions: 0/0
Shared Sessions: 1/3
Lifetime user detected. Disabling flight checks.
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You have not selected a valid instance of WoW to attach to!
Please restart Honorbuddy and choose a valid WoW instance to use Honorbuddy.
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1) Most major patches will break the bot
2) if you're on US, expect it to be and an update hopefully today
3) if you are on EU, this is a support issue -- if not, wait for update