Update reminder interval and resolve server side.

server/email/tasksEmails.js

@@ -202,7 +202,7 @@ const tasksRemindEmail = async (req, res) => {
 
     // Group tasks by assigned_to, to avoid sending multiple emails to the same recipient.
     const groupedTasks = tasksRequest.tasks.reduce((acc, task) => {
-      const key = task.assigned_to_email.user_email;
+      const key = task.assigned_to_employee.user_email;
       if (!acc[key]) {
         acc[key] = [];
       }