Fix BauGUICommand

Signed-off-by: yoyosource <yoyosource@nidido.de>

BauSystem_Main/src/de/steamwar/bausystem/features/gui/BauGUICommand.java

@@ -70,8 +70,12 @@ public class BauGUICommand extends SWCommand {
 
     @Register("import")
     public void importGui(Player p, String code) {
-        if (BauGuiImportExport.importGui(code, p)) {
-            BauSystem.MESSAGE.send("GUI_IMPORT_CODE-SUCCESSFUL", p);
+        try {
+            if (BauGuiImportExport.importGui(code, p)) {
+                BauSystem.MESSAGE.send("GUI_IMPORT_CODE-SUCCESSFUL", p);
+            }
+        } catch (Exception e) {
+            BauSystem.MESSAGE.send("GUI_IMPORT_INVALID-CODE", p);
         }
     }
 }