Fixes #1310

worldedit-core/src/main/java/com/sk89q/worldedit/extension/factory/parser/DefaultBlockParser.java

@@ -501,7 +501,10 @@ public class DefaultBlockParser extends InputParser<BaseBlock> {
             CompoundTag nbt = holder.getNbtData();
             if (nbt != null) {
                 if (!actor.hasPermission("worldedit.anyblock.nbt")) {
-                    throw new DisallowedUsageException(Caption.of("fawe.error.nbt.forbidden"));
+                    throw new DisallowedUsageException(Caption.of(
+                            "fawe.error.nbt.forbidden",
+                            TextComponent.of("worldedit.anyblock.nbt")
+                    ));
                 }
             }
         }

worldedit-core/src/main/resources/lang/strings.json

@@ -109,7 +109,7 @@
     "fawe.error.parser.invalid-data": "Invalid data: {0}",
     "fawe.error.unsupported": "Unsupported!",
     "fawe.error.invalid-block-type": "Does not match a valid block type: {0}",
-    "fawe.error.nbt.forbidden": "You are not allowed to use nbt.",
+    "fawe.error.nbt.forbidden": "You are not allowed to use nbt. Lacking permission: {0}",
     "fawe.error.invalid-arguments": "Invalid amount of arguments. Expected: {0}",
     "fawe.error.unrecognised-tag": "Unrecognised tag: {0} {1}",
     "fawe.error.unknown-block-tag": "Unknown block tag: {0}",