Uncaught ReferenceError: once is not defined and jQuery not executing properly

Working on it.

Hello @sandip poddar,
I've reviewed the changes in Drupal version 10.4.0, by following the below steps:

• Installed and enabled the theme version 1.0.3.
• Checked the console found "Drupal not defined" error.
• Applied the patch it applied cleanly, resolving the error.

Hence, moving the issue to RTBC.
Thanks