Fixed a few language entries that didn't use the material translation from the language file.
Fixed an error with invading non-nexus lands.
Fixed disabling invasions misc upgrade not working.
Fixed an issue where the plugin didn't show errors with some configs (such as the language file) if there were formatting errors.
Check if language file is working
The new fill-cost option no longer throws an error when it's missing since this issue was frequently reported.
Fixed %ammo% placeholder conflicting for both purchase amount and the actual turrets remaining ammo. The new placeholder for purchase amount is %ammo-buy-amount%