action [indices:admin/create] is unauthorized for user [elastic] with roles [superuser], this action is granted by the index privileges [create_index,manage,all]
What else does this user need? It is supposed to be a superuser!
The real error is because you cannot use wildcards for index mapping update request. The complete error response should contain a cause_by section that tells you the underlying error. This cause_by error message could be a bit cryptic before 7.14.0. It would say something like
There are no external requests known to support wildcards that don't support replacing their indices
It has since been improved and you should see something like the followings in 7.14+
the action [...] does not support wildcards; the provided index expression(s) [...] are not allowed
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