diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index baf3f854d..e0257ee14 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -19,6 +19,7 @@
 
 - [Pool] Add tooltip on "no XCP-ng Pro support" warning icon (PR [#6505](https://github.com/vatesfr/xen-orchestra/pull/6505))
 - [Backup] Respect HTTP proxy setting when connecting to XCP-ng/XenServer pools
+- [Dashboard/Health] Fix `an error has occurred` in case of unknown default SR (PR [#6508](https://github.com/vatesfr/xen-orchestra/pull/6508))
 
 ### Packages to release
 
diff --git a/packages/xo-web/src/xo-app/dashboard/health/index.js b/packages/xo-web/src/xo-app/dashboard/health/index.js
index e49a6086a..027a48dde 100644
--- a/packages/xo-web/src/xo-app/dashboard/health/index.js
+++ b/packages/xo-web/src/xo-app/dashboard/health/index.js
@@ -634,7 +634,12 @@ export default class Health extends Component {
         const nbHostsPerPool = countBy(hosts, host => host.$pool)
         return filter(selectedPools, pool => {
           const { default_SR } = pool
-          return default_SR !== undefined && !userSrs[default_SR].shared && nbHostsPerPool[pool.id] > 1
+          return (
+            default_SR !== undefined &&
+            userSrs[default_SR] !== undefined &&
+            !userSrs[default_SR].shared &&
+            nbHostsPerPool[pool.id] > 1
+          )
         })
       }
     )