Hi all,

I am trying to enable content search on a Unity Catalog managed volume so a Genie Agent can answer questions over PDFs. The Enable action fails every time with:

"Failed to update content search - The request was invalid."

Environment: AWS, eu-west-2 (London), serverless workspace on Default Storage, pay-as-you-go. This started as a trial and the failure is identical before and after adding a payment method.

What I have verified:

- Preview "Analyze Files in Volumes with Genie Agents" is enabled.

- The volume is a managed volume. Catalog binding is "All workspaces have access" (OPEN). Reproduced on two catalogs, including a freshly created one.

- I have CAN MANAGE on the volume.

- ai_parse_document() runs successfully on the PDFs in the volume.

- Foundation Model APIs work (ai_query succeeds).

- Lakebase is available in the region.

- I can create a Vector Search endpoint via the API and it comes ONLINE.

- Files are 4 PDFs, each under 10 MB.

Without content search the agent does not retrieve the files ("no relevant content from the reports directory"), so document and hybrid questions are not possible.

Questions:

1. Is content search supported on Default Storage / serverless-only workspaces? It is not listed under the Default Storage limitations, but it is the one variable I cannot rule out.

2. Is there a way to get a more detailed error than "The request was invalid"? No public API seems to expose this.

Happy to share the request ID from the browser network log if that helps.

Thanks!