"No viable path" errors simply mean you're not in the correct zone. For now, when you encounter this, you can do a few things:
- Open your Journal and click the "Map" button to see the location of the current quest objective, then move to that zone (as long as you know that is the quest the profile is currently trying to do).
- Open the profile and go to the line number being referenced in the RB window/log file to figure out the quest the profile is trying to to; then, do the above.
- Complete that step of the quest manually and cross your fingers that the next step is in the same zone.
I will be working on my own 1-50 questing profiles soon-ish. In the meantime, you can do one of the above.