Absolutely. The plugin is telling you that you’re doing pathfinding outside “world bounds” so your query will simply be rejected.
Use the DonNavigationManager actor to increase the size of the navigable world to fully encompass your world.
N.B. the larger the bounds, the longer your game will take to load the map.
“Infinite” / Unbound worlds are also supported as an experimental feature (v1.3 onwards) so if you’re willing to trade lower pathfinding performance for being able to pathfind anywhere (with zero load time for your game too) then check out this post of mine to turn that feature on. I thought people would have been really excited by that feature but no one seems to have noticed that post lol 
If your map is small, I recommend just increasing the size of your navigable world and keeping it bound. Any additional load time you incur will not be that bad in packaged builds (if you’re debugging Visual Studio in DebugEditor mode you’ll notice a real hit though).
Always keep an eye on the output logs. The plugin uses logs to communicate common issues and their resolutions too.