Please provide more info on what you were doing when this error occurred?  Are you upgrading a legacy workspace to Unity Catalog?

We are at the end of migration process. we wanted to visualize if we have any dependency on Hive before turning it off.

Click into each policy in the Compute UI of the Workspace to see if the policy ID exists.  If it does, then the account that invoked the SDK method didn't have workspace admin permissions.

The policy doesn't exist. I checked that.