Fix

src/main/java/com/volmit/iris/core/pregenerator/methods/AsyncPregenMethod.java

@@ -18,6 +18,7 @@
 
 package com.volmit.iris.core.pregenerator.methods;
 
+import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.core.pregenerator.PregenListener;
 import com.volmit.iris.core.pregenerator.PregeneratorMethod;
@@ -48,6 +49,12 @@ public class AsyncPregenMethod implements PregeneratorMethod {
     private void unloadAndSaveAllChunks() {
         try {
             J.sfut(() -> {
+                if(world == null)
+                {
+                    Iris.warn("World was null somehow...");
+                    return;
+                }
+
                 for (Chunk i : world.getLoadedChunks()) {
                     i.unload(true);
                 }

src/main/java/com/volmit/iris/util/scheduling/J.java

@@ -256,7 +256,15 @@ public class J {
      * @param delay the delay to wait in ticks before running
      */
     public static void s(Runnable r, int delay) {
-        Bukkit.getScheduler().scheduleSyncDelayedTask(Iris.instance, r, delay);
+        try
+        {
+            Bukkit.getScheduler().scheduleSyncDelayedTask(Iris.instance, r, delay);
+        }
+
+        catch(Throwable e)
+        {
+            Iris.reportError(e);
+        }
     }
 
     /**