diff --git a/common/src/main/java/me/lucko/luckperms/common/defaults/LogicParser.java b/common/src/main/java/me/lucko/luckperms/common/defaults/LogicParser.java
index 0ffa19bf5..737683894 100644
--- a/common/src/main/java/me/lucko/luckperms/common/defaults/LogicParser.java
+++ b/common/src/main/java/me/lucko/luckperms/common/defaults/LogicParser.java
@@ -38,6 +38,9 @@ public class LogicParser {
     public static boolean parse(String s, PermissionHolder holder, Tristate tristate) throws IllegalArgumentException {
         try {
             String expression = generateExpression(s, s1 -> holder.hasPermission(NodeFactory.fromSerialisedNode(s1, true)) == tristate);
+            if (SCRIPT_ENGINE == null) {
+                throw new NullPointerException("script engine");
+            }
             String result = SCRIPT_ENGINE.eval(expression).toString();
 
             if (!result.equals("true") && !result.equals("false")) {
diff --git a/sponge/src/main/java/me/lucko/luckperms/sponge/SpongeConfig.java b/sponge/src/main/java/me/lucko/luckperms/sponge/SpongeConfig.java
index 3ec1823bd..bda74a98c 100644
--- a/sponge/src/main/java/me/lucko/luckperms/sponge/SpongeConfig.java
+++ b/sponge/src/main/java/me/lucko/luckperms/sponge/SpongeConfig.java
@@ -118,7 +118,7 @@ class SpongeConfig extends AbstractConfiguration<LPSpongePlugin> {
             return def;
         }
 
-        return node.getChildrenList().stream().map(n -> (String) n.getKey()).collect(Collectors.toList());
+        return node.getChildrenMap().keySet().stream().map(Object::toString).collect(Collectors.toList());
     }
 
     @SuppressWarnings("unchecked")