Copilot agent ai plugin suddendly stopped working?

Question

Dear Microsoft Team, I encountered a problem that suddenly appeared. I have an AI plugin agent set up, and until yesterday, the authentication flow was working flawlessly. Today, however, the login no longer functions. Specifically, when I click the login button...

Nothing happens.

The status code i return from clicking the button is the following:

So it doesn't seem a request problem.

I changed nothing in my appPackage json files so no changes were pushed to trigger this problem.

For context, here's how i set up my auth flow:

agent ai plugin json file:

    "runtimes": [
        {
            "type": "OpenApi",
            "auth": {
                "type": "OAuthPluginVault",
                "reference_id": "${{OAUTH2AUTHCODE_CONFIGURATION_ID}}"
            },
            "spec": {
                "url": "apiSpecificationFile/openapi.json"
            },
            "run_for_functions": [
                "*"
            ]
        }
    ]

openapi spec json file:

  "openapi": "3.0.1",
  "info": {
    "version": "1.0.0",
    "title": "Gaia Intranet Manager API",
    "description": "API to manage and handle the intranet analytics data"
  },
  "servers": [
    {
      "url": "${{OPENAPI_SERVER_URL}}",
      "description": "Production server"
    }
  ],
  "security": [
    {
      "oAuth2AuthCode": [
        "api://auth-${{TEAMS_SSO_ID}}/${{AAD_APP_CLIENT_ID}}/${{AAD_APP_SCOPE}}"
      ]
    }
  ],

  "components": {
    "securitySchemes": {
      "oAuth2AuthCode": {
        "type": "oauth2",
        "description": "OAuth configuration for the analytics plugin service",
        "flows": {
          "authorizationCode": {
            "authorizationUrl": "https://login.microsoftonline.com/${{AAD_APP_TENANT_ID}}/oauth2/v2.0/authorize",
            "tokenUrl": "https://login.microsoftonline.com/${{AAD_APP_TENANT_ID}}/oauth2/v2.0/token",
            "scopes": {
              "api://auth-${{TEAMS_SSO_ID}}/${{AAD_APP_CLIENT_ID}}/${{AAD_APP_SCOPE}}": "Access analytics plugin API as the user"
            }
          }
        }
      }
    },

This is the auth part of my json files.

As said before, yesterday the auth was functioning flawlessly, this morning it doesn't work anymore.

Thank you so much for your help