Yes - you haven't granted that user access.
That might seem like an over-simple answer, but we don't know what you're doing, what you are looking at, where the error is, what server(s) you've configured and so on.
My guess is that it's an error showing in your log when trying to start Jira and you've told it to connect to a specfic database which either doesn't exist, or you haven't configured for the user to get into.
I'd start with the database settings, if my guess is right.
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