Upgrading from 3.52.1 to 3.53 broke our pulumi up runs. Fails right away with the following message

Pulumi Project:  pulumi/projects/tenant_onboarding
error: constructing secrets manager of type "cloud": secrets (code=InvalidArgument): POST <https://hidp-dev-kv-pulumi.vault.azure.net/keys/dev-stacks/decrypt>
--------------------------------------------------------------------------------
RESPONSE 400: 400 Bad Request
ERROR CODE: BadParameter
--------------------------------------------------------------------------------
{
  "error": {
    "code": "BadParameter",
    "message": "The parameter is incorrect.\r\n"
  }
}

Downgrading, with no other changes, gets things working again.

Ouch, apologies. Could you file a bug in https://github.com/pulumi/pulumi/issues with information about your Pulumi program (providers/packages etc.)?