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-6274319805-gov.caltech-edu.pp.ua/post/5876421039

  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-6274319805-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe54c0eedb06bf',cH: '_fhwsoPGV9Llx1rbl7BNi5oI.n0R9PYNw9N98qOVdJQ-1739213911-1.2.1.1-jMn5TRgT8PUY1QSzBUb3T.bwsEdIctSkak6foWEwaSWU7ocuRk3uw7I6G_gSkOuF',cUPMDTk: "\/post\/5876421039?__cf_chl_tk=g.sp99U8stc3Lh3jWCB6vUDDs6k9DMpyOIbthcgrm.Y-1739213911-1.0.1.1-lNHGtMNSxZ5FLROG3lDeTDUcV6TP_KnN2RI6xfVJi0w",cFPWv: 'g',cITimeS: '1739213911',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5876421039?__cf_chl_f_tk=g.sp99U8stc3Lh3jWCB6vUDDs6k9DMpyOIbthcgrm.Y-1739213911-1.0.1.1-lNHGtMNSxZ5FLROG3lDeTDUcV6TP_KnN2RI6xfVJi0w",md: "8p22YyT_4ElhsLaJ7paT9wywS2pdeHj0ZksM0vJ4yeA-1739213911-1.2.1.1-7IaUc6aSypDJmS7xmL4ziYdY9ERPbi3rB0Nqca9ILfIzpGRBOGeaye7DpUPXLFYiNR0ZIu8QRdb7OPnjiFIqRtlq1OcESNMz22j8uimY5sQYn1q8mMAF2s0RiXawdoSuLqAjr.my2BaKWsHi8YrtcqReP2uk.M3PoMOVvFyuAiHxP4F34UsIOHvWzY.NZuj83g_Het95C_.4YrR3VvYld4bCa0kRCftIhlcQpcjNsM.aOWNnxlo6Ikvg4Sv79yU8lqHp3.OQmwMAl_8N4LaLSD1sJF4CiHXR7pFSNuSOcEYTLKbm28Bma1pXQflBLAbOVsSOCZ8vc0oHdAgW51lm7VEVz_C3SzmSVv94fJhZWgvfsQCkU8gZ3glsr3r2eG6NtavWjQXqauZbVIb8iUe0WCrlxowxKfM75njdlI0PEdPL1Ui3QBjihWNyKQWzugJCiizB2GsRkU3yjOWaxrr1_v9KqE1ZyVJ1jtp5nfoOmM80GrEAkQ3UX4CS1hgjkKJMpAx.jnG7DCC5sHQvIJaNSuKsVx.2FM122X_vpzQmy9BGyCegQA9xdeRgu0_WYfXXIAfPTwqhCHe4yahZwX4ERY.i3RtQ8za2doSjuDov_WydI.9u3InDtCiTF7GdbdkXjvkeEd3H51W6Z6rLlAsrr0hMK_Xj2yA_Fre4T5OT03XPxYnH.HYsdCyn1tPT32O.E5yEVS3ieTirjBiM1jzx7NSe2eT3OE0XX9oVBjXxzkAzgBYSwZX6.uvEbBNMknl9RiqOck1.wIaCChJvLRO46xOya7F.XQRtVXqDJEEqrN.B1WH9omYXQQ59cr2BVeCOm4lmjgIjVU0DlGaGfxJTmXMuybKnl0GYGiGWA7rTZ2sYvDI1Rz_kMyuVQytRmDPL1CZ53AFsTqVIgAkIZnbMFr8zoET5knH9Nko3xGbhCJQnIZyWrz0yeufaP.xZCJ81j3ZvFv1d7lUg1BHQU112y_lvTUPE2GEKF4HqVUoy0ZZAmo3e7nIoX1rpw9QTS7GaTwbKG_Ne8B1LIj4xe.WghiQOF9yzCZluJi3vK2GPraRAW4Q.IqcRDgHIPY8a.tzDj8majCEgpOj6120pkgfx.MJVOJScTWKL7SDn9wOKnqlBdxGi20BmxLQwjD2BXKIXXodWAIBj2JIX5w5KMn8gh6LkoNFJNxHC3lpQeFTc7WeEUBRsj_U77nENHBQktM.28O01Jt9cbb0igfave8YKZRZhRKawHm41Aq9MMfuv_5CbjWIzmRvtjvZhdaM8CuN9K9jLzqFKBOHlIV_HtnE16cZrtiYq4DkKlO3W.gEuxgtZEXjDIBkTmwvqLlLYYrg7xR1a1eBzDKMksltf.vTiVSC.Mu7HekusnIl8uzLq3IElGdBL9q0g63WwGo6_B6Xagp3hnErTv986JUqRan5BV75OrjG9u4RKwJDpCN2A8cvBwYhTxCrmCMEyW4In14F5LItFizFzzLZF6xZOpiGM8Ql42Ke5L7Hxxswm7jGWemiyW7VwWzlrtm23iDUZfjsbi0h5.0nAg..u3mwAVlNR3jiTY3phalptKiX0cFYbOVw2AWNYws4JJWWDZ1hnzuzEKrbyTwYRbKhGYf6NwsAFb09eam1QAgjyWx5H1bmtRlkGgJnRvBmSyT9O02VqihMFrlZII1cmZoH5uYBBFDAqM0fTAmo.Tpxws_gwjmQ8lLqVp2gtKYseASBISUhvMKpMTSL5j84b4h67G6Lwi8l9gMmu7Jdke3qvi.KJvSaRZeIxQwirxS4wF.VXx_QHDtARVJ4JnT.VYA6Yrzcirqap_3RlOo7N2IpkGfbZ015Psli_vu2mJhrw7YxPcJPsOKnEm.ZuRS3vGmohr4ub19gDhSRodHEi_2oRbMR7Ryszv0G.t6csyssp2qEUaeqr7TSWqSN1Po.WqQ1Q6u78gfqOoPI1AYqpSR_pxlDxRJHRK3eIH7rqa9nQx4kBBrGQCud1lISG97l3mjU_2uMlUtIATswrGp_jS6W8QEccl_MQ8Uav0VyWzFSx8Yx1A0po2frNhT1N5zIK_PITES5ZbaOdC06dZhxBdvhormiq7PTXTi0SKX9wA8FiMONK4cHVfvZ2Egooo.YH0O4zhOE5jonsILyxvB4pQob1Lqgv1QWHzBLuNhIfB5.ewXgBvS9Ss99GAnJa0DN42dQ3jZPjLyfyfjt58tFZiGOSJhgycOv7BPNTrHKG4sYfoOlK9olKnmiYA9HlML2w87mJwJqOhsmMow",mdrd: "iNJbsBPn2THBjCRmHtM6StbJn31mRKNMjquz41qvKUg-1739213911-1.2.1.1-DVUTMfww9C7aPazA4y2YgC33clPBGSieMU9NjUCM281AJ2sFV0.RWjEfabFhZhvzEKRDwE10Oz6p.FwXTzc7CaSWKFa8WhOzzXL1.I74bakVrFdiVUp5yW.1C5PoLFV9OY6pNfjqLjUEu1_8WCBlCLGfux4Xm1byRFMMrxQoo083UFUJ.Lhw4nhfba._k1iw0BpW6IXo7PV3J9SShgL5kn2ANocilE9n300UU0zZsMgkHAAhAoDAQQRrYxhXd88q3J4LYd.K40FAjnZor.elTkzvTnMIRBNt3Bm8iXvgb1.JfZJsjUEypL718QIHo_FVC5lzDC7ajBH3u52EMYhKe_E.XtVgS1m8o7ylWa57uQvrQRTStXhk3wif3fPL2NyQTfnxxqdnfeDGM7bXnej98GLqiW1GYzzPg9jnPNe08qePw_S8woh2AHRvClzmwa7KAWs3xYtRIoVdBfPcGhDj4VnvEc5Z39kD9z6SBP9mLRSri.isnw_v9SBHfJ9fZyOEcQUcZZWQnnzBFfdmtTDrO5E1Qpga7nfS4wxYowSLxLOJWIIEAvosyFvo2q8fEzJgoLf5GyN8sLB_0VQB5AsRaFMCcjzcgYd4fh67.aOKNno.SGrDZ.2FO.AVAUwgPxpWyFDrUBpQgN4kpYEhjtJ.T3QK29Zqj8C2tXJHtYpGPHXWgT77vT756yIlmT9ScXnd7FOn5Z73nIIwMTGpK0exdO4c4AUPIqNsrCT2QC0fOynHZj_rdh2RDkVmz4lRhSHcI1YsCVVVtnlQSdKimPz.1R_dEGrhdZyZANuvc61HBEAsHDVu.SLM6CPn4f3wIXBshbZtLwaekcms85Ql15E441O2EBZJoKNul9eHDBSPP4tcqqdZVAfkWl7S5UPDi.mRJmJr6T_LOdUW7E4O2zisHoXW1IZu0qARTa.sDYX2bUV5zcE2kuUVk6BVigDdRYnaNMmxkLA02Qv.A19YFsEdLpTE2wx_fqJsID.JBp6nt552XGz9HM2r7VQM9.msn45tJ3reVC8oEIfGnOBeAwf2iQnLppjmVq9dicu3j5YhOBkjo4bpGqMLbau.CQY1.YYJyz7Wo1u2wWG1r_L5j2Mwu.p0fif7G8afEFBSRiIY2hL53V5_OQ82hy1CjVThGfnNBdgK2igH7G8TpKRTZWrazWau8Z01Dnaizcz8B3XZUAD5t_0dmR_fS8IH9fCvEWhKA.H8C3rczblzdRRFcmBAN1SzOfap8HjQoPehVrdG.1IIb2auY0r9cXTR2c1y.J2mRLgb16tUMFKZO0sHKhfE8PYNR2MwaLEfHEJLCFgDDwN7CTAnIMgzZBAjQ1XAZkWoQJF9fyc8.IHkMjZgQ7eD1HdMFt1qJ7vt5oZmVOwoAQhoMBYJOnnq0XSynhXXvtLsKy81TAzkPAWVV4n4X.crZgdqiuW0xYBsEQwIpcx56xiwUBPlxrCa5F9nc4Swqz.YRt22kTNRpIWKoktmhT64GR65y7pos24N5uIqLThCFO_HTMUCwuja1AywQjkKbFIBiFXjEW_h.eYpB289pofvtUYPygWmd20JqXFo425d7wpuG_Pdb3rSa1IqBQ7ZXe2rnKgtcwhOS9aATPbEOPNbfumFhW8r4d5mHUmGKUhiEDbbaOLiM4euoI7f7A.I7xXyE.Y9l5gXS3fJri5AAkUbCnaWwkSatYBmeQH.KLFE5E.hI8EeMChJKcFxv3fSYfBc2NNoBMkrbJxHpmwDAzEHrbilPpgYdW1LYzvj7Euh5Zgg.pYvek8Av4pRJRKDzZtbFnePDAw9tS8j.iPdGVM_dgxa57hH60h4tVIJNr0QdpfWdQnTvZyLq0YpoY5vlG.O"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe54c0eedb06bf';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\/5876421039?__cf_chl_rt_tk=g.sp99U8stc3Lh3jWCB6vUDDs6k9DMpyOIbthcgrm.Y-1739213911-1.0.1.1-lNHGtMNSxZ5FLROG3lDeTDUcV6TP_KnN2RI6xfVJi0w" + 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