Merge pull request #53509 from nextcloud/backport/53436/stable31

[stable31] fix(UserRow): fallback to group name in case of undefined availableGroup

apps/settings/src/components/Users/UserRow.vue

@@ -428,7 +428,7 @@ export default {
 				.map(group => {
 					// Try to match with more extensive group data
 					const availableGroup = this.availableGroups.find(g => g.id === group.id)
-					return availableGroup.name ?? group.name ?? group.id
+					return availableGroup?.name ?? group.name ?? group.id
 				})
 				.join(', ')
 		},
@@ -438,7 +438,7 @@ export default {
 				.map(group => {
 					// Try to match with more extensive group data
 					const availableGroup = this.availableSubAdminGroups.find(g => g.id === group.id)
-					return availableGroup.name ?? group.name ?? group.id
+					return availableGroup?.name ?? group.name ?? group.id
 				})
 				.join(', ')
 		},