JeffTheKnifer

I made a spigot box server a while back, and now for whatever reason it just wont start up. whenever anybody tried to join, it kicks them for "Unknown" and then gives this crash message: io.netty.channel.AbstractChannel$AnnotatedConnectException:finishConnect(..) failed: Connection refused /***.25575 and that happens every time i try to join. sometimes it works, somehow but it ends up crashing after an hour or 2. Anyone know what's up with this? Edit: I just got the crash report from console: here that is also java.util.ConcurrentModificationException at java.base/java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1486) at java.base/java.util.TreeMap$KeyIterator.next(TreeMap.java:1540) at net.minecraft.world.level.TickListServer.b(TickListServer.java:70) at net.minecraft.server.level.WorldServer.doTick(WorldServer.java:438) at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1314) at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:438) at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1217) at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1050) at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:305) at java.base/java.lang.Thread.run(Thread.java:833)