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-5837941206-gov.caltech-edu.pp.ua/post/5837941206

  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-5837941206-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ffe14e7d1ec953',cH: 'PY08gXrxj_4qfP1.Z8D6_odBS.d.TU9l10SRQrCR3i8-1739230154-1.2.1.1-0u9ocuahiCpm8Eq1yQ4fSHG5JpcXSIJHc7jRWxrlYlLdIXxGDGTbLYGMbrCRgjeF',cUPMDTk: "\/post\/5837941206?__cf_chl_tk=qN.TDBH0ox.rzj0Twj6HYoaaUSOA5KgfXj2.NrYBUlI-1739230154-1.0.1.1-ZeidLqDn2LTuePp7ujnEIllI0odwkYhIldJo1BKPIZo",cFPWv: 'g',cITimeS: '1739230154',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5837941206?__cf_chl_f_tk=qN.TDBH0ox.rzj0Twj6HYoaaUSOA5KgfXj2.NrYBUlI-1739230154-1.0.1.1-ZeidLqDn2LTuePp7ujnEIllI0odwkYhIldJo1BKPIZo",md: ".uIhz6h95mERPyQKlQz5bkE9R_EvKXYcG4KC5sceSz8-1739230154-1.2.1.1-9YQBLLq_wNWQG_dl.6JYgwRkF3qfo.79_z_E_kaNrBMFY2oGfTe5eqcVxy0JZy6jl.zNfqp1X5SYJAHsmcLfnjRk3KqIxZOYkR6MpDdTOxhXWfHBaNY7m_ZYCDgBENkbpA5SC2HzGhRSIHTKReTixWhZembhwpOXwD1kX3xktmiHgYw7qSCFQ8pcj94557mB8GnbYkrfDRTvSqleg_jTAfaKYFGl4TRENWmSCC3M04VoqotAUz3b6qtB.KNX1e0VMeLNbDLp1G0HFzItfenF_6fFEF5vWA7lqaKzc6WiQOmr1sxPWhCXNpigLakw_T04p0qvh7oPVJmM07xlz6aehG9Io_4BUA8Yhr7ew8Fw8kM06LBIdZ57IbQHhq9NWkRRDibN2FIRaeOPNkCdyVjFkhEJTFJrOCyfN1aTIrcjisj5ebYpBTo8kuy6imEs.dOKuUkBqWRmNpi54XM5s7Ra3v0NgVe8ufWUoNdwB719eHnlaFhhveR0LkguEWCT1MEVYoHgvcEtd8gRGgq7aByCtXMCf1hav1MKj83..dLwiiUf0iRhFCmuVI8U5PG6r93BEbjlvU.cBZZDgC0aqsNR5bTi4tWN0vTOTCcaX3lmFoTJAKRAYzBNp393zaiFtl1c7_RBWp3gVGyn1o7xJVgmr5kqbZlcjIjLlImVTAQ64Ry40NMbrjv_0RDnMqWuIkW43NUU_swmJUPFL75UkBsUTnibmGoZdZEU8roVnpCWEZOaIkFWnmg6uPdN2w8t4PfTBsI8lmvWFhoIGMMC3NaaldhOHLhicfjPlrFreDMOlRkjN.TzwEall5G4.nqzTQuo2XJsLHx0H6OTiqReI3ziHE2lNeY43dUdtBm3ModVQkVNC.4tAwYCaDDLelwPeHuMHgpAw0acf62xRNYrdf7bogKrKNd9cT25YxQsKcPdZgEdZSDb.hHBnfT8J3FxDo.XdcCRzqDEOmXS63h1R34zhf8q9nYgD6gdAE6ga3R3cYmtBD3cJWaam02PsJ2qcaqNuP0C_0QWf078WYkc29w8jxbAeq8o91B_hApwVsmjwYPkOq7iyDs9bXXidvboOqvlkoJqhQYaPbv0q0yIaxxnsrfwoXn3TN_mJ613L7cm5wTb9BtvwmW6uIbdDbNVX09Exrgmth8ZALCAjRdZYRRST3.taJRFTQLq21eBse.gJOQ7r2vKeZeKA7l2xDk51Zu4UcVmM3.1elVdASdw4tr70_Wi3AfB34vdkW77mMRtYxNfROLJUEVPDvJAFXXezwW0v0ZVSE5FZnHtvgPDt2PJYPDUmsA3ej2nBxHtRU8ZLCrNxpHsyYebTiroF._81r72eFUHqYnKACP66lN.0o5PbK9vUKUW_dk5O6wKI6JcKndfjHknUbYKCIm0JXX4KtEsMZPkVJ6dMwlWfgPDLrnLNxKOKcp7m1pybFIkA6Sxh8b8J9f3ZPzBiLrf5dfrCjLpoy3nYHmAsItuNDqni4xdLbuovB0s6Q.5_jBHjXNou32n9TosqkjgIK5oLq5k0ulO0EWVD99CSs5gT3ysb7KPepJY7VKPQS.kj1g_.Tt7LbTatFAw5M86bGHgX6uAIoDqN0F1LJw6LMjxq8BxFSz9fPMzxJW1ewqwk0fbY.xOjlthT069bV.UwcXs68FS5SU6d3tGrz33hkyqRxAtZXvCaZ7BVE.KRAvAg.UaJ4WAhrbrsnkbWgrAyUlPitCit.5jiJpsc6BQQLo_NMxpVU5wk0.z1ZahQBppbaqjHE4.lrYvD4ANNo4Pvy6rptgD6eM_3PaLrh17fPvyX7IX3t1.ziBWI5EK66wmSJV6V.LtrHenVUhBWxzJzuYIXWxjFJ1YuVdqjPK.hcp2UPjciKiW0dOnCty2Xaw0S_P56MAZfpwAbVv2aadsPr_YbYpFjTv0HSC4NKvYp3AXtNfcefne6QyNygHjZ9Ce8jOX0z9vTukeq4v3KEWKVssdK2o5DZuoBwJxfrE509BT9rpeEWuhlz0NliZP3v24krXpvpHx2wida3vqI0qUPKr.kkXuqLTsFDgojnxRgweSqgzUXZH3Qs9HM1NjxP7CttXUrNXXuJGKt6WYUI7B81qBsht2UFnO7u2.2wpJl5ytAgg1UF_MmV90INqfaJSLtC0OZay6q.3rJI6hMF4vNJxjxA17D.E0qB5CJLHizizEA07rtoQQgidIpodTrBC_YbREbVjRe2lg1ukliCwyQ3QuBgRFoUWzbnI4TVcNcdg8S8_5OisyrQ",mdrd: "Zi1oLoBGSee8midOGh3.VTz1C3.6rKy.EGyh2HeNwVg-1739230154-1.2.1.1-wZWlyQ3kRfjhRSo1xaIgJgmyyDEMPSrlmJbF3K3EjGgwDY4wTI1nGDhhpR6OTfte3lNIZPneVLCFSccGNvWj0JQZc3XAQiK4bwt1soW9aJXOMBSatv3NY8FRTwcI_wU2bmcdzM5pvLJFPJWzU1mSVvB10QI._kZIDfsGOvR1_zVeXybwktxLGnHk1fue5cCAD86al1R2SW3AK88KCw7dwjcSneLFKJXpKmQa8UKWUnyrRijL5hexZdu6o9_cuuuXN2yBBb7PacNILrjOh3xhgvBsPKTA4OE2JQzaDXvlGuH8odn8U05sXfYjXK32hESuKtVyGV3he69.kP5.t3eBG6th3MSvEDPEwFK3LYLHnq.FrnvgT4OeoH0_PVf7r835CoPrXe0yA_GCEBmcX6Fwkz_.L4mFAPxQMV5wYe5YamJPxfjf1RvXrj6JUSOjs3Vhda9v4cw.KHyAabQA3WUP5Qi4eBHuOdb2VVTtW87clKppVBxYhDjHv7Rc2pveA2Gakf9aEN..RogjpZQ3Bf9UpR41eDOE7FwAkYaUbiFoT9T7VB50jrM.hw7taa3mjQmEkZQjxOHjrKHCRFGXeGfRdosSuHLXS4hoHX03HgZDkxh4vo5E.BttmV2uqUUURlZUjUvCHcA4y1izpyb9BN8kgSydeE1NYBZL29xFkrB8QWrqe8oxoMHGo6RJB22nPc8rwbvaqYg.5RX1IBn1Csjzm2evPBiu9haqJEWe3xxHjTwF.G6B632lrPtpZvYQhqwmydF5Wxij4Tt5_Pv9zDe55lFvlqcgRsiCzt9fj2Bbvl1OpNg9zOSadVmW5zEurZJTWlu_KJxw9ugAfW8E2GqqCl3uOtjHajKePTDTqN79nDFECqdAbPNGhgWz4b1b3u_6ChCi7Uwddk3fOWgcnCcnGdEgS5yMoZ63WznJ43o1Iy8pG_2wfnSJdTsxS4J7_8q8GiL5L9lVPYqyctcCxN8_yjfdWLR.ABeNBCyVWsrQtQSUwVTbKYqTYKMvTHJ6MWTs7TG42KijfsJZ4cvCsPr6DaKmQsxSO1m5H7Dx9rgn84EfThljK_AFfd6wm9Z10Ih3zqJM5uabZ4DExyrGGH4ZfmMd5AS9_odTY5k5jB5hquLcUnm5qJX8NhFKmE_H16kQpByMyTbqeqY5xIQqD7nbYVgYwpjRvN_60Lv51HHbfmGxRrtSG7Q8GiHUxMuUNpA.ya.zQmC4t1ynuskBCjdUPSZTRfPtjcEEGdqooPQYi6CjN1vJMPIyBWz8gulsmmK9LcygZF56gIHZclxT4F5ifFfD.SSSMgB_n8FuSd8oSw4R_I6r6T2LskNpHwGSX_9E4yVdPnOOCR.vai.y5iVmD2vyaNrbMJHJV4U2IXAlZ3wwGIEesMvoZXUZbcH00OZeIY81pPJGdBKR6mOco27wjhupGIMW40Jn2py3Nt08N5mqb5PRMAtbQmii.P9cCf44QFqwz.5E0cOxfw37yT6wtx4zScYfodtK7Vbf_hDuRpuPz9MifSjB1OMP6.EE6ab7ruCWe72TPcgs3aHiwHYU26qpfbBayW00R8d05YtLV9gYu8BWC9yY70BCvPgHGyWT8Hus0P2sDixhIIJjYtVnxTHdRuaPfEuuBsB5LfpbVIshhoql3MSMLpDpYRE5DULdXPyaU3imWhQND4EvgaaHr5uFxh4OcO_d8N.AhWP8zBDR44u.0QjJFfhpIj0.R50dsZn.S_weAUriUR0S7lNtZlmXhiG6ALBEPq3uZHybc_Q0QgQ1yAxFfVhcWUNG__fd3Sz.25PVqa.rkcgKskrCUAGY90Wxs3u2WlKB_4JWA7tHMX4J8P2Ii8IfGGHmG0SU"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ffe14e7d1ec953';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\/5837941206?__cf_chl_rt_tk=qN.TDBH0ox.rzj0Twj6HYoaaUSOA5KgfXj2.NrYBUlI-1739230154-1.0.1.1-ZeidLqDn2LTuePp7ujnEIllI0odwkYhIldJo1BKPIZo" + 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