diff --git a/client/src/app/core/core-services/http.service.ts b/client/src/app/core/core-services/http.service.ts
index 8ae0f375d..7e10cbcbd 100644
--- a/client/src/app/core/core-services/http.service.ts
+++ b/client/src/app/core/core-services/http.service.ts
@@ -159,9 +159,13 @@ export class HttpService {
             } else {
                 const errorList = Object.keys(e.error).map(key => {
                     const capitalizedKey = key.charAt(0).toUpperCase() + key.slice(1);
-                    return `${this.translate.instant(capitalizedKey)}: ${this.processErrorDetailResponse(
-                        e.error[key]
-                    )}`;
+                    let detail = e.error[key];
+                    if (detail instanceof Array) {
+                        detail = detail.join(' ');
+                    } else {
+                        detail = this.processErrorDetailResponse(detail);
+                    }
+                    return `${this.translate.instant(capitalizedKey)}: ${detail}`;
                 });
                 error = errorList.join(', ');
             }
diff --git a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
index 6c216b2b1..8552bfa91 100644
--- a/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
+++ b/client/src/app/site/assignments/components/assignment-detail/assignment-detail.component.ts
@@ -346,7 +346,7 @@ export class AssignmentDetailComponent extends BaseViewComponentDirective implem
             ...this.assignmentPollService.getDefaultPollData(this.assignment.id)
         };
 
-        this.pollDialog.openDialog(dialogData);
+        this.pollDialog.openDialog(dialogData).catch(this.raiseError);
     }
 
     /**
diff --git a/server/openslides/core/config.py b/server/openslides/core/config.py
index 9b86a34ab..dff3bea31 100644
--- a/server/openslides/core/config.py
+++ b/server/openslides/core/config.py
@@ -256,6 +256,16 @@ class ConfigHandler:
         """
         return ConfigStore.get_collection_string()
 
+    def remove_group_id_from_all_group_configs(self, id: int) -> None:
+        for config_variable in self.config_variables.values():
+            if config_variable.input_type == "groups":
+                value = self[config_variable.name]
+                if isinstance(value, list) and id in value:
+                    value = [x for x in value if x != id]
+                    db_value = ConfigStore.objects.get(key=config_variable.name)
+                    db_value.value = value
+                    db_value.save()
+
 
 config = ConfigHandler()
 """
diff --git a/server/openslides/users/views.py b/server/openslides/users/views.py
index 5890f9e0d..1bcad2415 100644
--- a/server/openslides/users/views.py
+++ b/server/openslides/users/views.py
@@ -657,6 +657,7 @@ class GroupViewSet(ModelViewSet):
 
         # Delete the group
         self.perform_destroy(instance)
+        config.remove_group_id_from_all_group_configs(instance.id)
 
         # Get the updated user data from the DB.
         affected_users = User.objects.filter(pk__in=affected_users_ids)