unable to load worlds

[dan28000]

when using bukkit flag to move server.properties from default location while having custom default name of worlds it causes this error to ocure
(the flag has been there since at least 1.8)
due to having hardcoded server properties path here

PhantomWorlds/src/main/java/me/lokka30/phantomworlds/misc/Utils.java

Line 459 in d571152

try(final InputStream input = Files.newInputStream(new File(PhantomWorlds.instance().getDataFolder(), "../../server.properties").toPath())) {

[12:19:46] [Server thread/ERROR]: Could not pass event WorldInitEvent to PhantomWorlds v2.0.12
java.lang.NullPointerException: Cannot invoke "String.length()" because "prefix" is null
	at java.base/java.lang.String.startsWith(String.java:2285) ~[?:?]
	at java.base/java.lang.String.startsWith(String.java:2327) ~[?:?]
	at PhantomWorlds-2.0.12.jar/me.lokka30.phantomworlds.managers.WorldManager.loadManagedWorlds(WorldManager.java:66) ~[PhantomWorlds-2.0.12.jar:?]
	at PhantomWorlds-2.0.12.jar/me.lokka30.phantomworlds.PhantomWorlds.loadWorlds(PhantomWorlds.java:242) ~[PhantomWorlds-2.0.12.jar:?]
	at PhantomWorlds-2.0.12.jar/me.lokka30.phantomworlds.listeners.world.WorldInitListener.onInit(WorldInitListener.java:45) ~[PhantomWorlds-2.0.12.jar:?]
	at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor36.execute(Unknown Source) ~[?:?]
	at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77) ~[basiclandmc-api-1.21.1-R0.1-SNAPSHOT.jar:?]
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:72) ~[basiclandmc-api-1.21.1-R0.1-SNAPSHOT.jar:?]
	at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:60) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:630) ~[basiclandmc-api-1.21.1-R0.1-SNAPSHOT.jar:?]
	at net.minecraft.server.MinecraftServer.initWorld(MinecraftServer.java:773) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:724) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:516) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:374) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1226) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:330) ~[basiclandmc-1.21.1.jar:1.21.1-DEV-d08a3cb]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]