Hi @Retired_mod... no luck.  Still the same error of "Access Validation Failed" with a sub-error of "Internal server error" when we try to create the unity catalog metastore from the Databricks account console.  To the best we can tell, everything else works.  Databricks is currently working for us, this is just a protoype unity catalog that we are setting up to create some new workspaces for.  But no luck on the "create metastore" step.