Um, yes there is. If I go to a project header on my dev kit or jira.atlassian.com, then I get the reports menu and the created-vs-resolved report is available and works.
Could you explain what you are seeing and what you've customised (it sounds like you've turned the reports off, but that's guesswork without more information)
It sounds as if you might be in administrative mode for that project. If there is a link of "Exit Administration" on the top right, you'd need to click it and then re-navigate to the project once you're out of administrative mode. Then on the Summary tab, you should see "Administer Project", "reports", and "Filters" near the top of the page. Reports should be in the "Reports" dropdown.
Ok, so you should have the reports menu there. I very much doubt it is missing, I suspect you're still looking in the wrong place. I was about to post what Edward said...
Could you give us a screen shot of what you're seeing on the summary tab of a project?
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