diff --git a/Packages/webxr/CHANGELOG.md b/Packages/webxr/CHANGELOG.md
index deacb6c6..d35071a7 100644
--- a/Packages/webxr/CHANGELOG.md
+++ b/Packages/webxr/CHANGELOG.md
@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - An option to auto-load WebXRManager on start in WebXRSettings.
 - An option to auto-load WebXRInputSystem on start in WebXRSettings.
+- Error message when there's no Universal Render Pipeline package in project.
 
 ## [0.20.0] - 2023-12-18
 ### Added
diff --git a/Packages/webxr/Editor/WebXR.Editor.asmdef b/Packages/webxr/Editor/WebXR.Editor.asmdef
index bab0fd0a..da362da2 100644
--- a/Packages/webxr/Editor/WebXR.Editor.asmdef
+++ b/Packages/webxr/Editor/WebXR.Editor.asmdef
@@ -1,5 +1,6 @@
 {
     "name": "WebXR.Editor",
+    "rootNamespace": "",
     "references": [
         "GUID:fd4abe4ffe74ef1448afe15c6cb36bb7",
         "GUID:f9fe0089ec81f4079af78eb2287a6163"
@@ -13,6 +14,12 @@
     "precompiledReferences": [],
     "autoReferenced": false,
     "defineConstraints": [],
-    "versionDefines": [],
+    "versionDefines": [
+        {
+            "name": "com.unity.render-pipelines.universal",
+            "expression": "",
+            "define": "HAS_URP"
+        }
+    ],
     "noEngineReferences": false
 }
\ No newline at end of file
diff --git a/Packages/webxr/Editor/WebXRBuildProcessor.cs b/Packages/webxr/Editor/WebXRBuildProcessor.cs
index 54c51305..c351e965 100644
--- a/Packages/webxr/Editor/WebXRBuildProcessor.cs
+++ b/Packages/webxr/Editor/WebXRBuildProcessor.cs
@@ -8,46 +8,46 @@ namespace WebXR
 {
   public class WebXRBuildProcessor : IPreprocessBuildWithReport, IPostprocessBuildWithReport
   {
-        /// <summary>Override of <see cref="IPreprocessBuildWithReport"/> and <see cref="IPostprocessBuildWithReport"/></summary>
-        public int callbackOrder
-        {
-            get { return 0;  }
-        }
+    /// <summary>Override of <see cref="IPreprocessBuildWithReport"/> and <see cref="IPostprocessBuildWithReport"/></summary>
+    public int callbackOrder
+    {
+      get { return 0; }
+    }
 
-        void CleanOldSettings()
-        {
-            UnityEngine.Object[] preloadedAssets = PlayerSettings.GetPreloadedAssets();
-            if (preloadedAssets == null)
-                return;
+    void CleanOldSettings()
+    {
+      UnityEngine.Object[] preloadedAssets = PlayerSettings.GetPreloadedAssets();
+      if (preloadedAssets == null)
+        return;
 
-            var oldSettings = from s in preloadedAssets
-                where s != null && s.GetType() == typeof(WebXRSettings)
-                select s;
-
-            if (oldSettings != null && oldSettings.Any())
-            {
-                var assets = preloadedAssets.ToList();
-                foreach (var s in oldSettings)
-                {
-                    assets.Remove(s);
-                }
+      var oldSettings = from s in preloadedAssets
+                        where s != null && s.GetType() == typeof(WebXRSettings)
+                        select s;
 
-                PlayerSettings.SetPreloadedAssets(assets.ToArray());
-            }
+      if (oldSettings != null && oldSettings.Any())
+      {
+        var assets = preloadedAssets.ToList();
+        foreach (var s in oldSettings)
+        {
+          assets.Remove(s);
         }
 
-        /// <summary>Override of <see cref="IPreprocessBuildWithReport"/></summary>
-        /// <param name="report">Build report.</param>
-        public void OnPreprocessBuild(BuildReport report)
-        {
-            // Always remember to cleanup preloaded assets after build to make sure we don't
-            // dirty later builds with assets that may not be needed or are out of date.
-            CleanOldSettings();
+        PlayerSettings.SetPreloadedAssets(assets.ToArray());
+      }
+    }
 
-            if (report.summary.platform != BuildTarget.WebGL)
-            {
-              return;
-            }
+    /// <summary>Override of <see cref="IPreprocessBuildWithReport"/></summary>
+    /// <param name="report">Build report.</param>
+    public void OnPreprocessBuild(BuildReport report)
+    {
+      // Always remember to cleanup preloaded assets after build to make sure we don't
+      // dirty later builds with assets that may not be needed or are out of date.
+      CleanOldSettings();
+
+      if (report.summary.platform != BuildTarget.WebGL)
+      {
+        return;
+      }
 
 #if UNITY_2020_3 || UNITY_2021_1
             if (!PlayerSettings.WebGL.emscriptenArgs.Contains("-std="))
@@ -56,28 +56,36 @@ public void OnPreprocessBuild(BuildReport report)
             }
 #endif
 
-            WebXRSettings settings = null;
-            EditorBuildSettings.TryGetConfigObject<WebXRSettings>("WebXR.Settings", out settings);
-            if (settings == null)
-                return;
+      WebXRSettings settings = WebXRSettings.GetSettings();
+      if (settings == null)
+        return;
 
-            UnityEngine.Object[] preloadedAssets = PlayerSettings.GetPreloadedAssets();
+      UnityEngine.Object[] preloadedAssets = PlayerSettings.GetPreloadedAssets();
 
-            if (!preloadedAssets.Contains(settings))
-            {
-                var assets = preloadedAssets.ToList();
-                assets.Add(settings);
-                PlayerSettings.SetPreloadedAssets(assets.ToArray());
-            }
-        }
+      if (!preloadedAssets.Contains(settings))
+      {
+        var assets = preloadedAssets.ToList();
+        assets.Add(settings);
+        PlayerSettings.SetPreloadedAssets(assets.ToArray());
+      }
+    }
 
-        /// <summary>Override of <see cref="IPostprocessBuildWithReport"/></summary>
-        /// <param name="report">Build report.</param>
-        public void OnPostprocessBuild(BuildReport report)
-        {
-            // Always remember to cleanup preloaded assets after build to make sure we don't
-            // dirty later builds with assets that may not be needed or are out of date.
-            CleanOldSettings();
-        }
+    /// <summary>Override of <see cref="IPostprocessBuildWithReport"/></summary>
+    /// <param name="report">Build report.</param>
+    public void OnPostprocessBuild(BuildReport report)
+    {
+      // Always remember to cleanup preloaded assets after build to make sure we don't
+      // dirty later builds with assets that may not be needed or are out of date.
+      CleanOldSettings();
+    }
+
+#if !HAS_URP
+    [InitializeOnLoadMethod]
+    private static void OnPostprocessAssets()
+    {
+      UnityEngine.Debug.LogError(@"WebXR Export requires Universal Render Pipeline,
+using Built-in Render Pipeline might cause issues.");
+    }
+#endif
   }
 }