Fabric Warehouse SQL endpoint suddenly broken – SELECT 1 fails, metadata accessible, other Warehouses work

We're experiencing a strange issue affecting one Fabric workspace . Symptoms: Warehouse and all Lakehouse SQL Analytics Endpoints in that workspace are affected. Warehouses and Lakehouses in other workspaces (same tenant/capacity) work normally. Metadata is accessible (schemas/tables are visible). Every SQL statement fails , including: ​ SELECT 1; Error: A severe error occurred on the current command. The results, if any, should be discarded. Code = 0 State = 0 The same behavior occurs from: Fabric SQL Editor SSMS Power BI semantic model refreshes Additional observations: SQL endpoint settings