diff --git a/Assets/VRM/UniVRM/Editor/Format/VRMExporterWizard.cs b/Assets/VRM/UniVRM/Editor/Format/VRMExporterWizard.cs
index 5a9bbd5cd..950fdde62 100644
--- a/Assets/VRM/UniVRM/Editor/Format/VRMExporterWizard.cs
+++ b/Assets/VRM/UniVRM/Editor/Format/VRMExporterWizard.cs
@@ -705,12 +705,17 @@ namespace VRM
 
             m_validations.Clear();
             m_validations.AddRange(Validate());
-            m_validations.AddRange(VRMSpringBoneValidator.Validate(ExportRoot));
-            var firstPerson = ExportRoot.GetComponent<VRMFirstPerson>();
-            if (firstPerson != null)
+
+            if (ExportRoot != null)
             {
-                m_validations.AddRange(firstPerson.Validate());
+                m_validations.AddRange(VRMSpringBoneValidator.Validate(ExportRoot));
+                var firstPerson = ExportRoot.GetComponent<VRMFirstPerson>();
+                if (firstPerson != null)
+                {
+                    m_validations.AddRange(firstPerson.Validate());
+                }
             }
+
             var hasError = m_validations.Any(x => !x.CanExport);
             m_IsValid = !hasError && !MetaHasError;