diff --git a/addons/test_website/tests/test_qweb.py b/addons/test_website/tests/test_qweb.py
index aab35f16da1..e498232e09a 100644
--- a/addons/test_website/tests/test_qweb.py
+++ b/addons/test_website/tests/test_qweb.py
@@ -62,7 +62,7 @@ class TestQweb(TransactionCaseWithUserDemo):
         <meta/>
         <script type="text/javascript" src="http://test.external.link/javascript1.js"></script>
         <script type="text/javascript" src="http://test.external.link/javascript2.js"></script>
-        <script type="text/javascript" src="http://test.cdn%(js)s" data-asset-bundle="%(asset_xmlid)s" data-asset-version="%(asset_version)s"></script>
+        <script type="text/javascript" src="http://test.cdn%(js)s" data-asset-bundle="%(asset_xmlid)s" data-asset-version="%(asset_version)s" onerror="__odooAssetError=1"></script>
     </head>
     <body>
         <img src="http://test.external.link/img.png" loading="lazy"/>
diff --git a/addons/web/static/src/boot.js b/addons/web/static/src/boot.js
index 22d71a145bd..438d2e485d1 100644
--- a/addons/web/static/src/boot.js
+++ b/addons/web/static/src/boot.js
@@ -406,6 +406,15 @@
     }
 
     function displayModuleErrors({ failed, missing, unloaded, cycle }) {
+        if (window.__odooAssetError) {
+            // this flag is set when we have an error loading the script for an
+            // asset. We sometimes see a 404, probably due to the fact that the
+            // attachment has been deleted. It is unclear in which circumstances
+            // it can happen, but we sometimes observe it. We could here force a
+            // reload, but it seems dangerous, since in case of errors, this
+            // could easily lead to an infinite loop.
+            return;
+        }
         const list = (heading, arr) => {
             const frag = document.createDocumentFragment();
             if (!arr || !arr.length) {
diff --git a/odoo/addons/base/models/assetsbundle.py b/odoo/addons/base/models/assetsbundle.py
index 2eca5ec3d7a..e7983615773 100644
--- a/odoo/addons/base/models/assetsbundle.py
+++ b/odoo/addons/base/models/assetsbundle.py
@@ -196,6 +196,7 @@ class AssetsBundle(object):
                 ["data-src" if lazy_load else "src", src],
                 ['data-asset-bundle', self.name],
                 ['data-asset-version', self.version],
+                ['onerror', '__odooAssetError=1']
             ])
             response.append(("script", attr, None))
 
diff --git a/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py b/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
index 0937ff1f2cb..5c8a96ca0aa 100644
--- a/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
+++ b/odoo/addons/test_assetsbundle/tests/test_assetsbundle.py
@@ -624,7 +624,7 @@ class TestJavascriptAssetsBundle(FileTouchable):
         <meta/>
         <script type="text/javascript" src="http://test.external.link/javascript1.js"></script>
         <script type="text/javascript" src="http://test.external.link/javascript2.js"></script>
-        <script type="text/javascript" src="%(js)s" data-asset-bundle="%(asset_bundle_js)s" data-asset-version="%(asset_version_js)s"></script>
+        <script type="text/javascript" src="%(js)s" data-asset-bundle="%(asset_bundle_js)s" data-asset-version="%(asset_version_js)s" onerror="__odooAssetError=1"></script>
     </head>
     <body>
     </body>
@@ -655,7 +655,7 @@ class TestJavascriptAssetsBundle(FileTouchable):
         <meta/>
         <script type="text/javascript" src="http://test.external.link/javascript1.js"></script>
         <script type="text/javascript" src="http://test.external.link/javascript2.js"></script>
-        <script type="text/javascript" src="%(js)s" data-asset-bundle="%(asset_bundle_js)s" data-asset-version="%(asset_version_js)s"></script>
+        <script type="text/javascript" src="%(js)s" data-asset-bundle="%(asset_bundle_js)s" data-asset-version="%(asset_version_js)s" onerror="__odooAssetError=1"></script>
     </head>
     <body>
     </body>