I did. A quick google search shows it is a non-published, non-peer reviewed report that was written mostly by a couple of economists (not epidemiologists) who were found on record as early as March 2020 as anti-mask. The report was not issued by THE Johns Hopkins University (which maybe would have been a gold standard). Serious reporting calls it the "so-called Johns Hopkins report". Its methodology and findings are as full of holes as Swiss cheese and the only media outlet that gave it any coverage was Fox News because it plays to their predetermined
narrative. The reason mask mandates are being lifted is because they have worked, not that they haven't.