Fix data loader issues

src/main/java/com/volmit/iris/core/loader/ResourceLoader.java

@@ -286,19 +286,23 @@ public class ResourceLoader<T extends IrisRegistrant> implements MeteredCache {
     }
 
     public KList<File> getFolders() {
-        if(folderCache.get() == null) {
-            synchronized(folderCache)
-            {
-                folderCache.set(new KList<>());
+
+
+        synchronized(folderCache)
+        {
+            if(folderCache.get() == null) {
+                KList<File> fc = new KList<>();
 
                 for(File i : root.listFiles()) {
                     if(i.isDirectory()) {
                         if(i.getName().equals(folderName)) {
-                            folderCache.get().add(i);
+                            fc.add(i);
                             break;
                         }
                     }
                 }
+
+                folderCache.set(fc);
             }
         }