diff --git a/source/changelog.txt b/source/changelog.txt
index a1847d7..36a8275 100644
--- a/source/changelog.txt
+++ b/source/changelog.txt
@@ -5,6 +5,7 @@
 #### Deprecated
 #### Removed
 #### Fixed
+- Fix displaying error message for the case the group is not found
 #### Security
 
 ### [0.8.0] - 2022-01-09
diff --git a/source/front/graphql-wrapper.js b/source/front/graphql-wrapper.js
index 15d0b88..f765cc5 100644
--- a/source/front/graphql-wrapper.js
+++ b/source/front/graphql-wrapper.js
@@ -37,7 +37,7 @@ export function getUpcomingEvents({ url, limit }) {
 
 export function getUpcomingEventsByGroupName({ url, limit, groupName }) {
   const query = `
-    query ($afterDatetime: DateTime, $groupName: String, $limit: Int) {
+    query ($afterDatetime: DateTime, $groupName: String!, $limit: Int) {
       group(preferredUsername: $groupName) {
         organizedEvents(afterDatetime: $afterDatetime, limit: $limit) {
           elements {