/t spawn and /n spawn not working

[Wextra]

What steps will reproduce the problem?

1. Found a town
2. Execute command /t spawn
3. Player is not teleported to town spawn.
   (Applies to /n spawn as well, manually using set spawn changes nothing)

What is the expected output?

1. Found a town
2. Execute command /t spawn
3. Player is teleported to town spawn.

Towny version

0.98.1.0

Server version

1.17.1

Please use Pastebin.com to link the following files

1. Your full server startup from the logs\latest.log: https://pastebin.com/fq2JRH4s
2. Your Towny config.yml: https://pastebin.com/G4W2NCBk
3. Your townyperms.yml: https://pastebin.com/TUXdEVkX
4. Your log's error: None in console, however following error appears in chat: Cannot invoke "com.palmergames.bukkit.towny.object.spawnlevel.NationSpawnLevel.equals(Object)" because "nationSpawnLevel" is null