This error occurs because your Clay API key is either incorrect or missing. Here's how to fix it:
1. Find and copy your Clay API key by going to Settings > Connections > search for Clay
2. Add the API key to your integration account in Clay under the Integrations section
3. Save your changes
4. Try the write operation again
Hey Tim
1. Go in your Settings > Connections
2. Delete the Clay connections API Key
3. Go in your Settings > Account > API Key
4. Copy the API Key
5. Go back in your Settings > Connections > Clay add the API Key again
Let me know :)