Issue with broken token endpoint link when calling Copilot Studio Agent from JavaScript

I am using the sample code (path: SSOSamples/SSOwithEntraID) to implement SSO login for a Copilot Studio agent, which is being called from an HTML page using MSAL in JavaScript . However, the API links for the token endpoint and conversation endpoint appear to be broken. Any help would be greatly appreciated.

These links were obtained from the AI agent's channel options in Copilot Studio. Here are the links: https://default{TenantId}.{Integer}.environment.api.powerplatform.com/copilotstudio/dataverse-backed/authenticated/bots/{cre...}/token?api-version=2022-03-01-preview

Please see the screenshot attached. Replace client id with Azure tenant ID. It shows result/response for conversation endpoint. I am getting same response for token endpoint.

Error Message: Invoke-WebRequest : The remote server returned an error: (404) Not Found. At line:1 char:1 + Invoke-WebRequest -UseBasicParsing -Uri "defaultexxxxxxx ... + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebExc eption + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand

Start by reading the SSOSamples/SSOwithEntraID sample and comparing its token and conversation endpoint usage with the links from Copilot Studio channel options. Reproduce the 404 response for both endpoints and verify the expected endpoint format and request parameters. Done means the sample reaches the token and conversation endpoints without a 404 response.