| Issue | Checks | Resolution |
| Cannot connect to the MCP Server | Endpoint, network, and whether the client supports Streamable HTTP | Confirm the URL is https://mcp.orbsis.com/mcp; update the client and retry |
| The browser did not open the authorization page | Whether the client has completed OAuth configuration | Check the Client ID, Client Secret, and configuration-file format, then start login again |
| invalid_client | Whether credentials were copied completely and whether the application was revoked | Verify the credentials again; re-register the application if the Secret was lost |
| Still no permission after authorization | Application scope, user role, and tool permissions | Confirm whether the scope is Read-only or Read-write, and ask an administrator to check user permissions |
| Expected tool not found | Current tools/list, version, environment, and permissions | Refresh the connection and retrieve tools/list again; confirm with the technical team that the tool has been released |
| Amount displayed incorrectly | Whether the amount was interpreted in cents | Convert according to the field unit and state the amount unit explicitly in the prompt |
| Access must be revoked | OAuth application or Connected Agent | Disconnect or revoke it in the Business Portal; contact an Admin & Ops Portal administrator for forced revocation when necessary |