diff --git a/src/utils.js b/src/utils.js
index 7e5afb1..d173d3a 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -266,6 +266,11 @@ export function WebSocketProvider({
           setUserProfileStateUsername(body.User.Username);
           setAllUsers(body.AllUsers);
           setAllRoles(body.AllRoles);
+
+          if (body.CategoryGroups === null) {
+            body.CategoryGroups = [];
+          }
+
           setCategoryGroups(body.CategoryGroups);
           setGroupTasks(body.GroupTasks);
           setGroupTasksSteps(body.GroupTasksSteps);