It could be that the bot is downloading the Mesh files.
Mesh files are pretty much how the bot to sees the 'world' around it. That way the bot knows how to navigate around the world properly. (eg: go around hills, avoid mailboxes, go across bridges, etc)
Without the Mesh files, the bot won't know how to 'walk' around the environment.
If the bot is travelling a large distance, it must download the Mesh 'tiles' from your current location, all the way to the endpoint location.
In this situation the endpoint location is probably a quest giver.
So larger distances will require more time for the Mesh files to be downloaded - however once downloaded, the bot won't have to download them again if that path is ever taken again.
Give it some time and the bot should start moving.
Unfortunately there's no visual ques by default on Honorbuddy to tell you if the Mesh files are downloading, so you'll just have to give it your best judgement and about 5 or 10minutes.
If it doesn't move after about 10minutes, give me a log to see what's going on.