## Troubleshooting Agent Copilot

This page lists common issues you may encounter while using Agent Copilot and provides troubleshooting steps to resolve them.

### Why are some tiles not appearing in my Copilot workspace?
You may see a message like `The following tiles are not registered in the workspace layout and will not be rendered: <tileId-1>, <tileId-2>.` This occurs because some of the Nodes in your Flow aren’t correctly configured in the [Copilot: Set Grid Node](https://docs.cognigy.com/ai/agents/develop/node-reference/agent-copilot/set-grid). To fix this issue, ensure all Copilot Nodes are added to the Set Grid Node with the exact same Tile ID; check for typos. If the tiles are not needed, delete the unused tiles from the grid and related Nodes from your Flow.

### My Copilot workspace shows the error `<host-name> refused to connect`
This usually indicates the workspace is pointing to the wrong host. Use the correct base URL (`AICopilotBaseUrl`) for your installation.

### Why is the Sentiment tile failing to render?
Two key issues can prevent the Sentiment tile from displaying:

- No model selected for Sentiment Analysis. In **Manage > Settings > Generative AI Settings**, make sure a model, such as `gpt-4o`, is selected. Without this model, Agent Copilot can’t render the tile and may return a 500 error.
- Flow contains incompatible Nodes. Standard output Nodes, such as Say and Question Nodes, can’t be placed below the [Copilot: Set Grid Node](https://docs.cognigy.com/ai/agents/develop/node-reference/agent-copilot/set-grid) in the Agent Copilot Flow. Remove or disable incompatible Nodes to render the tile correctly.