UC_NOT_ENABLED is a cluster configuration issue, not a permissions issue on the user. Databricks throws UC_NOT_ENABLED when the compute is not Unity Catalog enabled, i.e., its access mode is not Standard or Dedicated / (data_security_mode not USER_IS...
Based on the error, which is a "502 Bad Gateway" error indicates that a server sitting as a gateway or proxy received an invalid response from an upstream server. Here, Databricks is trying to communicate with the external MCP server associated with...
