It looks like this is a web page, not a feed. I looked for a feed associated with this page, but couldn't find one. Please enter the address of your feed to validate.

Source: https://mit-edu-7453980216-gov.caltech-edu.pp.ua/post/863654551567

  1. <!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="390"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "mit-edu-7453980216-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fcf9f3f8500615',cH: 'fUaRZOxHaAMatLrkzT8hZ02c46uzzVkR7oDNk.MV6t8-1739199706-1.2.1.1-hu4GXeYsnFPAavcccnR7GQz._F8rKWPPr2wUH3a5_3wx3kBp9EM_aFvFgyyKBXhI',cUPMDTk: "\/post\/863654551567?__cf_chl_tk=znVuVand0mwq1xjUABTBaprVw1o6udENOBp5BW_ql4A-1739199706-1.0.1.1-wDG0WekSo6Q8JDXp_hU7hW7mUT.GGFcTQ6nTSjwu0fc",cFPWv: 'g',cITimeS: '1739199706',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/863654551567?__cf_chl_f_tk=znVuVand0mwq1xjUABTBaprVw1o6udENOBp5BW_ql4A-1739199706-1.0.1.1-wDG0WekSo6Q8JDXp_hU7hW7mUT.GGFcTQ6nTSjwu0fc",md: "c0HGJbHJo93H5CmPolULTOD3rulYBzEUG9OcfljkP3k-1739199706-1.2.1.1-5Lsy5W2fxnAWe7g6fm9RyM.azwVFILYPaw2DBeGs_Q4tvBrE4TJAc5OOXp1AAR8HcYLGZBrZ4WHmg346GZ50C6KT9bwIUwdzX68L6Tk80mFL6zCvt8zlHZpLCLENWBc0bDJ9iAu4pd8jT8w.D5AlwY7k17tW5C4cIy5s.AK4Z2EoRzCVpVQ_VW6rMZHimgA9zE1PUuEyFKU8wZNPePfRl1HEAwjag487Dfvojw4EjltMOPV.TcmypNABA7e9l_PdzTlz3PxN92aw1TEw7jw6aIv4OK5.GEIuf5pv7_QcDn4xOB1CDMFod6BcbFdq1XwJ7xy4ca5KtJEDxuvzmF9SPrqFqjhrloCq6GPxo.KdwMvSEyl1RmRN817DQoZ.WFXhYsrQTduCFPZ6VpLVhBy1b28z.cTFFLI2sGl4MNkRe_YmeNGXE.cSIyH7CSWO21e9An_yKz3uyXVGSK3RoyZ6KGvH.VITW.vkin642jEtrVWsywFgEqhHVAKegNAc.BKGt.fz01tPcdSXqBmNV4_ntl83l13xJL6qJ5obF8UYyWQBkZLSQu0BQ_eoSIsMulr5hzxbPDxnQIW.Fwz0RCG7LpZ01cv7vWG5nhNZ495lb2mqE6.BAde620VIXxSpswNuV_lG1lEHALoQey8ySNYIyo0kURmOqci_PgFhTusr1x3fKmgnvQvOZi8wUF1Ynpps7bYPBirDKcz25aXF96se0MsWqE77O9Of1RPbEGWgjTDRw27YuGR2aA0B9.RBXvVREuC7U1AGb0vnvcz1OitMdILrxjrODCRP1_WxI6z.iDpkbTsHvwUiRFaK8SsD0oAIU89xjFzu6V4AZDw732u6g8RLR3Q.FQcogIdAWk7ZlUxvMO4eGmkIEv2scZ2tllSwGsD05tgfdvocORS5I4kVSSs8IpAXVBL2y4tAApsXMG182Gi7Oru7XxlVCvQ1wAAT0i9_NUV37B7fFOrRvLg6bQGhw.CESWlc4Hbv3b7xEHoPHk3jBzjg0TFju8CWoNrEzOQPZPB.J_Vj8J2Ju1aboL4VsmAUJX_T34kFjbkqN0hXmS.pXHv_kz2U6SMp4s4zz.J5ZY85GsQs5B1y6fBp_EXupVE_FjckOtXh2ZGby3X51ev1sPRxnaG09i1NG8pWPES3qOtTwwMZt0kIdC.BWfvtNDNOG3bpUq1S5mNb9l1k84wIe9K0Qn7E8BIFfUALHzKk9xPMR1rnUBwed2gr.zsbQ51g5r3jYiRuoKa7CoofQmZHenTVQ.T4Q..91GSA5RORwuj6me3Ev6yn_y6REzVC8UQA3U5JemrPktliT5CxA_o5NGU724Yi0jP4WbF9NpUfTXuRaQ_rJxbXRueEFGz1AY4csV9rT3sKGMmlLgU2mkPGyXqr2DmVsCzIucUd98o8LK.tllTnwhE2Jyj1.bT3mTyOMi.MZDj5go8nsJkNXw5mzavB1pkaSY45RXKGlVzgfcn9BWZkeqERF2qCGAYZUCdQI1mk8d75_MpDUx.x.ohWYtNDri_hVXkB_gG3zB57S1mGbTqscSNL3re3_oqG2h_BsiRPdZ3fae1zb_H7BKd_B1R41nVF23cHL78CkKxjt0vXxB6k4GADemPd0W34gcdPTlIY.qQ2EhTg3a5TK4dAf4AEw_oqxEOOSXxVkKJerUZSf6HieG6MrKb_LsUGl.UIBOYXvmc8tXnhfmMlVKHyBAqooa.WAWMQe1tzcSjqYi46wOLgVZmAohnWnFmylNSoHsr_enpDykYeSD1hid7cGpVZ9.eY1HJaj.f0JqjtmsggNkdy2HbLbdIrbzKe3rtOEx9inezquMh3WrkpZ0pj6SFLbzMBJjbTB2iDlZ4aeJBdyo057XoVo_A2qJ8qSmqMzqscDPPct2u.BZUM5ZIC3G2xzgDQl18.GnvUOXx11bwEPaKWOES7yd3VTZKKNbv6RdJoe2NsiuMOTkxdV2Ov0q1GNCZsRQaNDqWRnCkMQA8pYurKpW_pjsyZpZMWhCmjcU8c.tyARb24ub26a.9kaPdV6A8_nzZQ_k16HqB2Gsy07ImYCae15NuPUidyv98IEe3ZmQXJ8DjVuAUxrOhqwMMsvYTMrT.Xyzjv2IhxHhliN77UFy7mU1NZUsftF8wWIpEIyWVwvBTFb1B_nWkhgEm__OHsJGqH8vEvZPKT0oDTO.LSFx_pywhf5zYtuH_fPLlPO18w7bftZE.9CjoA4Yd9pkSODie3PF.ftAQXHgwPk76fSH16umI78Q",mdrd: "XaIiTGX7DgSZHVpGptGo60z2_gmONp.hsjt4IpY9ZTw-1739199706-1.2.1.1-e6Diz_aBVtmik.fY06VAymSTpwUSZ1zvmVUQDNLktPwGSnY5HpcNECFIFzTzlSviA8DUaDNqUMVc7mBo9k3JWcv9Lq5pqbkurhBmXjLmF59L4PAuc5Us.gX4Bk46gZMHD8YNHjjTOFj6XqN_KdpVNErUtEcAVOrajeBQyRAY8UtKbG29QCIHY1bK8lOMWbHaqc3fPV08GMPBkywWuwR4VDl88pLLZubkE85QOs4Lj.4De3p9pXUKrYCzuX.n9yzfs.OBgyAeavEtQXOnzgGOPTSoZTCW68v32uFb4hmVcPElmVXax7VxsZmXfxlsfcRZuYGFShLMfmg2xrEYAtCMVTxtGQB4piPPLXeXgDnSjq9rRbZWmnEoDOmNtnfxVK7tnvBS7QjPcaMuJFBNoyR6p3c5eDgZQ11Wgo0g13zLxY9YEyieyAXVa52Z8tGLbbtZVGm5a7wkvBQeNjgvVyUFrEyOxAcomAsDJ1nvutUCwexumbdNcTesXSlRl1EkfSsaK3GSiyxmkJX87i2m_dRSRba7eLHNSg_5LvK1WRB5D4B1lJLHSatH_Pw4QUbys.xS88SsNXTIjNYeeObaL5IkKpX62j6yWsqaQ8bzEnxjbHGSLXypkmQSqFta4QYMhLZO5BQJphzN58T_ADm4BdwMHL7pnz8x0rrmE10rm4cDqZfdlK5.hQWJRIA6kkUOpyYb7yYYT7uF2_Qp7JfRhHd8DjlEtszum2_Vp7a.sR6U77avIzNrfDThL0tqhzywh.reAiNDfAxl6wq1P4b0KyUGScr5DC6qCnBiT6aakJHWMr_rDI_OBYaIEQpgrtruPFwsfWb3Ht4ns7NPDKd3hPNQTbEP9jAs.LwYF4X7qKLZ7Zr836UrqraWXAjs0dnWYHQ9dUiVDS62fXJ_4TH21_LaOfUvED7wZcjKd_yrfWanoZAGh46E94TbVdaAz_BP.JBZ6dWpStTtABt7cz1lE4gFfoaBWk49Pb1BRnJ5T0VfOwE_2uQQtUiRpUR._bmpFa3Y5jDd0AljiWEbvfTqCvdxXT_0XjEwRHt2EZqvAwAgm9Zog3MXaw8DPRvp0CiDgCI9wcqdDMc2oUTh.gDAy03UIbeQLL4P9M6lE1Um82EtoGtI_S470qHzZpqnRvUduN8rPaYWkM2E4jhHZTa6TVf28dzI97nrwMfUwGMuR_5_p4nTYYleNhkVZz83VI72G9cnzdrCFvs6yH5u7GdvG89Vxa8YzrCVGZy9seLWa3iqZyyAgKTzjO_Q422twdTOFISVeMm3H1iqQmTiC6x3zn68A9LG9ZdnFSIM4RcdwXPL2PdRvkHkAvLcOSqPHihnr4kah2u8LgF9dkEx3JWsXCmMGpO0AxdVJYAljwqjycIW.9YEK194TevD.2O6YGXKlQVxnA0AcCV1qVuhQKlhpM7lSfVG5Oq5uLr9VBwQLPHHaPa_ce.NBSzNA6Zj1iJSLXRsFATlqiiw9PZuXfdLpafVODSiPJ7CerolHg4dUFR4c3rc_qW68fVxO2jGBLQmjhyjbLHTkChTQGAGJFlVTJmlBvUMlOnkePuLYcaZnqWcMKB8jUrtrfkNguIMR7uo713XWmcM.EQZObsW0p6MtHg8Kx942gL4XOLMxUHXyWDuCMrRk5RtLwG8qk_KZVJ.sxA0asRJQZzEA6S9XuJUSgWNJAqrNjIiTy8chNEFUnmLTtI0BCINS_LyNOtyp6yc8JwUkN53IZZF27882OlXztseOer_Xmyv2NC2xhTkVpBsw8x9tsSicZr0.VrduJpycFIvIp_ui3Jw8sngC.IqBNexhfm8_bId0zvyf.oj4TF28OS7GJHL7m8vdPP1Nv_tbtJo"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fcf9f3f8500615';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/post\/863654551567?__cf_chl_rt_tk=znVuVand0mwq1xjUABTBaprVw1o6udENOBp5BW_ql4A-1739199706-1.0.1.1-wDG0WekSo6Q8JDXp_hU7hW7mUT.GGFcTQ6nTSjwu0fc" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda