Why aws showing page not found page while accessing some route?

Question

My node js application is working in localhost. But, while using after hosting in aws ec2, some pages showing 404 page because of 500 error.

// this is my route 
router.get('/view-order',adminVerified,adminController.viewOrder);

below is my controller functionn

viewOrder: (req, res,next) => {
    try {
      adminHelpers.getAllOrders()
        .then(data => {
          console.log(data);
          res.render('admin/view-Order', { layout: "adminlayout", orders: data })
        })
        .catch(err => {
          console.log(err);
          next(err)
        })
      
    } catch (error) {
      next(error)
    }
   
  },

below is my helper function

getAllOrders: () => {
        return new Promise(async (resolve, reject) => {

            let orders = await db.get().collection(collections.ORDER_COLLECTION).find().toArray()

            let sortedOrders = orders.reverse()
            resolve(sortedOrders)
        })
    },

if I try to go "domainName/view-orders" then it will show 404 page.

my repository link: githubLink