Quicksight dashboard doesn't show up and its showing the badrequest errors..

[Handys1]

Hi, I have followed the steps. The quicksight embedded dashboard doesn't show up and getting the badrequest error after the user login via cognito.
Can someone please help to address this issue and to make the dashboaard appear on the page.

https://cognito-idp.us-east-1.amazonaws.com/
{"code":"BadRequest","message":"The server did not understand the operation that was requested.","type":"client"}
error

screenshot attached