URL with hostname "xxxx.udel.edu" is not allowed. on Dspace 9.3

[Joshua Kim]

Hello,

I am updating our DSpace server from 9.2 to 9.3. There is an error as below. Can someone help me to understand why our system has this error?

=============

 at serverSideRender (dspace-angular-dspace-9.3/dist/server/main.js:1:7558408)
5|dspace-u | Falling back to serving direct client-side rendering (CSR).
5|dspace-u | Error: URL with hostname "XXXXXXXXX.udel.edu" is not allowed.

==========

*** I added hostname at dspace-angular-dspace-9.3/angular.json.

 "serve": {

          "builder": "@angular-builders/custom-webpack:dev-server",

          "options": {

            "buildTarget": "dspace-angular:build",

            "port": 4000,

             "allowedHosts": [

               "xxxxxxx.udel.edu"

            ]

          },