I would assume that means the AHBot does not have a proper account ID set in worldserver.conf
Usually what I did was leave the default admin account alone (changing password for it if it's a public server), then just leave the default account ID set for the AHBot.
I believe the bot needs an account to technically store the items on; So without a proper account it resets it all.
Rough guess, can't say for sure. Did you delete the default admin account, or use it as your account, or anything like that? Or did you leave it alone?
Either that error is based on what I stated, or those are ignore-able errors that have nothing to do with AHBot, and just a missing NPC ?