diff --git a/source/changelog.txt b/source/changelog.txt
index 6125179..76fd494 100644
--- a/source/changelog.txt
+++ b/source/changelog.txt
@@ -8,6 +8,7 @@
 #### Deprecated
 #### Removed
 #### Fixed
+- Show group not found error message in block
 #### Security
 - Escape translated strings to prevent HTML injections
 
diff --git a/source/front/blocks/events-list/edit.js b/source/front/blocks/events-list/edit.js
index d46b5ae..c24ac73 100644
--- a/source/front/blocks/events-list/edit.js
+++ b/source/front/blocks/events-list/edit.js
@@ -39,7 +39,14 @@ export default ({ attributes, setAttributes }) => {
         }
         container.querySelector('a').href = showMoreUrl
         await fetch(url)
-          .then((response) => response.text())
+          .then(async (response) => {
+            if (!response.ok) {
+              // Reject if no 2xx response.
+              const data = await response.text()
+              return Promise.reject(data)
+            }
+            return response.text()
+          })
           .then((data) => {
             const events = JSON.parse(data)
             displayEvents({
@@ -50,7 +57,8 @@ export default ({ attributes, setAttributes }) => {
             })
           })
           .catch((data) => {
-            displayErrorMessage({ data, container })
+            const parsedData = JSON.parse(data)
+            displayErrorMessage({ data: parsedData, container })
           })
       }
     }, 500)
diff --git a/source/front/events-displayer-test.js b/source/front/events-displayer-test.js
index 994f855..8b22eae 100644
--- a/source/front/events-displayer-test.js
+++ b/source/front/events-displayer-test.js
@@ -83,13 +83,7 @@ test('#displayErrorMessage general error message display', (t) => {
 test('#displayErrorMessage group not found error message display', (t) => {
   const container = t.context.container
   const data = {
-    response: {
-      errors: [
-        {
-          code: 'group_not_found',
-        },
-      ],
-    },
+    code: 'group_not_found',
   }
   displayErrorMessage({ data, container })
   t.is(container.querySelector('.general-error').style.display, 'none')
diff --git a/source/front/events-displayer.js b/source/front/events-displayer.js
index c00b723..62fd252 100644
--- a/source/front/events-displayer.js
+++ b/source/front/events-displayer.js
@@ -72,13 +72,7 @@ export function displayEvents({ events, document, container, maxEventsCount }) {
 
 export function displayErrorMessage({ data, container }) {
   hideLoadingIndicator(container)
-  if (
-    Object.prototype.hasOwnProperty.call(data, 'response') &&
-    Object.prototype.hasOwnProperty.call(data.response, 'errors') &&
-    data.response.errors.length > 0 &&
-    Object.prototype.hasOwnProperty.call(data.response.errors[0], 'code') &&
-    data.response.errors[0].code === 'group_not_found'
-  ) {
+  if (Object.hasOwn(data, 'code') && data.code === 'group_not_found') {
     const message = container.querySelector('.group-not-found')
     message.style.display = 'block'
   } else {