Terraform apply output showing 404 error attempting creation of vault master encryption key

output.txt

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module.vault.oci_kms_key.master_key: Creating...
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│ Error: 404-NotAuthorizedOrNotFound, Authorization failed or requested resource not found.
│ Suggestion: Either the resource has been deleted or service Kms Key need policy to access this resource. Policy reference: https://docs.oracle.com/en-us/iaas/Content/Identity/Reference/policyreference.htm
│ Documentation: https://registry.terraform.io/providers/oracle/oci/latest/docs/resources/kms_key 
│ API Reference: https://docs.oracle.com/iaas/api/#/en/key/release/Key/CreateKey 
│ Request Target: POST https://kms.us-ashburn-1.oraclecloud.com/20180608/keys 
│ Provider version: 5.41.0, released on 2024-05-11.  
│ Service: Kms Key 
│ Operation Name: CreateKey 
│ OPC request ID: 90f47e284c86ad77c59f36ec363ff2cd/83219311E16D271A8BF4165311960323/14F76810A1ACFA61442417EDECA21A86 
│ 
│ 
│   with module.vault.oci_kms_key.master_key,
│   on modules/vault/main.tf line 23, in resource "oci_kms_key" "master_key":
│   23: resource "oci_kms_key" "master_key" {