Surf Server - maps error: "Nav file is wrong or something (1)"

I’ve had this server for about a week now but some of the maps (when changed to) will crash the server and “Nav file is wrong or something (1)” is printed in the console. There is no .nav file for the certain maps that I can find to delete or fix.

Any help is appreciated, thank you in advance.

(User was banned for this post ("Wrong section - try Help & Support next time" - Shendow))

That error is not the cause of the crashing – try removing some of your addons.