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-5902671483-gov.caltech-edu.pp.ua/post/413777779780

  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-5902671483-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fb18041f90e62b',cH: 'mtkoyNNqKfRqimISrqjP8wWc1NlObAWz2ev2MGSL9Io-1739179966-1.2.1.1-0H_uwqjk0D67cGW3Tj4y5vFxQLwn4gaOydCGVylg2uV5Oi1wCKhFKG2FtDYFv4OU',cUPMDTk: "\/post\/413777779780?__cf_chl_tk=.yoA6Yy9FVr2elPZy9EJZo0rwvzqeh8UbGuYU3bKtsE-1739179966-1.0.1.1-9nXYpA26913BUZBSG69jrpZ6BFtjbT.VgTHqBwdJqyE",cFPWv: 'g',cITimeS: '1739179966',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/413777779780?__cf_chl_f_tk=.yoA6Yy9FVr2elPZy9EJZo0rwvzqeh8UbGuYU3bKtsE-1739179966-1.0.1.1-9nXYpA26913BUZBSG69jrpZ6BFtjbT.VgTHqBwdJqyE",md: "qmo5jaOUf1vtQNigZrkj2L.41smEMfpmwsx.rhT9m5U-1739179966-1.2.1.1-u5ExL5HJSKzhwRfKdRFcj9DX9ZjGDfphu79Of9uGNKGz8Inm2pRy28CiKydXUkXBYobIqjiGhckDg4NU0BjWWId7GSnUa9QF5ukIkysOiw2m_Nmyo34Z3J4jJkkPbok7nA4TnvSYVTUXx284qM_WRHy1bcQ4L9WSXt62AvXA9dQkMuVdM.Xlg3PvKMwKzrmQzGhiDYmbGWWPPp_5aLN7Su2697m_uwFify4MKsFErPUCsxul3dQ4ig_dMWe6in4nAQUbaOM6FpAk34hfueKuZa1X9um.Oq8TV3nA8YWmvJbNvV7Y1CuCJOO5bVwOMtxDZ.gg4PXdwq1TV7NL3939p9M0V7F0Jj1KEhQAlea3lUVqRLprA3MmItGF0QGhvIv8vEi3PGqMGe7leYB6EDwp4FlcsZRX5_9pdIMmsxmHZaEwnGzEjp7ay.uQFED_56ejzO0nxzXMp3ONYSgMQ_c15GqcIQdYk1zNL24UnszOHbdXfG2M3SKmZXIw2pfMyzS_EHacOKFd.Q1ipOVKnh5HoQLbZBC7vQ1euBxBmPQ1QWr7Jx3orEBnuqkKvZjzq7VZie_2ugY0ZGk.ULe27UTdA9.CC2vMbZydzvyzXJI3VydECXux_XQGYHyfeDHDnANJSwU4Rd4J8yaMd56rRL0ldrmMRbOrVFDCg5wiSatfQbL0.AeddQ5z3V5ofBwxwJwzWsnStKcjOG.s9jxQjHSuOUF_2tB4rDZFP3SgfclvcimTYEssL9Qs2_eYZCwOYS3BRW98g3AbwYq8rHMJOLhboowO5hxnLwx7HAf9yUKfekrGn3lW413ivXHP8sTgQRmf_WA6wqeDL8xJv9KNkcIY06LG1Q6EYB81mUScFIfH1AB7pnClL7rkyg0DJ4YmNjoCzL1NM5Alo7Vamequ0jxrrksQKgs.eh9ND49Q_wovqSxWdgTiIGdY0YqXeYtb.RzcJpICa7Fh6Iqb_6CMZlsWqTQg_KRpEizBkX00yXQZIykrDjflnmNI9Hqlrfp4OcP53laljwGZgxrPaXjmLvXfphYmC7c_fKDriAFZoFzHjMSLe9Z__l4FYZwaqEeQkXve_NlH2VuOJfwyRrQ_nDkFxonRSjumOHmsx_n2KfTg1hdM2Uja39ORgQdboiQOMeAwv7rtkkQ1FnHTU9z2QUvQn7yeIpQjDO4K9bFijL6msk26CFdBDuqooDC6_jZy2KKYGsVs6g0SO2r8.2J_w0wPZNfzNjgsZEWKleoJv_nCiYHOacjc2dsv9CJhajgczKB.bd6kYUsv0PetXDc1iToGmNgteXjPscIiFgoUzoEnZbCHyNlAguPEcQI7IjlnuXpZA6SRPxqNawO.6mI81X5metz7Nq2OOZNo3IWzcBQiPwQKO9vQ2X8KogDlFxa6UdwHUilv8vk6eE9loUSw1vmGixyFox92nRxtXJtEZS8T931Bjd9FYhGuq746uasy5h.h2krg4zuXHkVF2PbEG05htNM8pTxt4c_2t4TILiRmDKGO45cYfKHOqi0T8sMYpF8S8.kWiajotldARFjOqKa53.OR_exXAamXVzJ24hDNbwC2cSBbKu6_kZojOcgh5vMyWi8vvQbfmIjxEvd2wZ47npQugtTqMSZnmrtrS5uFL3kwM1vRr2VsZYAvASjYyBpYxq7KoqGwtEY7g5VCsr7rpgz8NMc9qSMe68bhPMjGnLbJQ5PMuKz_HyO2MMR9SaBws2qC_.RAKPICo3roRq8.2kHrvBcM3tjqSTwFcIv3ggwZ7C4B2zutlksa1c3DtUZZwX6B3NIKJA0Hi021iYOQ9DWdh8vLR0ToESHnNV3xy30zj6SU39AJVzue2U3NTj_G8xxRn.Ik_DSyZkORZqFxWiOWBCIj7quZrIRwVszfguBpngX4Wksh6v9U_a2QCAN4UZKyqJWPHC5gF71QjoFZzj_Iqi2VWUZiRnRoQY1999nOo_ahUJojpAuxBUz952jyhshwAR4UBnyM.GAiH5yDJ4.RdRkVI39_cPOJIAlkDkPk0iiBtKQjsy3iCQgEc147EE0brpF8nPNLSCaJM7MWkwpUxSYmPvUN9GC6BxuIYgmdf78jH8gkxhDy1crRoJKdo8mZWQMVtMA2qJesQlK0Lh6iEdZV3saab1XuMTZgMn8cujitS1ZrvLZ30zekEb1fgvTgMFNccrao8lc1LAN.sbdpgrXc.e.LyMXWwuIOi3eo3XVF2_KxueU4F0CVfU3Ujx7fTBkZ3CpsKVu0dvFeYw",mdrd: "CVtYYhrK3qggB10gAWcz.EM67aYplPVOnGHqY2BO918-1739179966-1.2.1.1-cNKEFL.89LX3FIm51S0gv5HGBmNi9j86vr7uPA1o3vJ7790UBzLij.3GWYHXgD3aTcp7Qkh1bpHsX.xSwAcmUk5FEFVmBR9p2_X5VEK3tBBa7u3lxtfdRmu4MGw8QKegnMqSdRtDZRuUoNt1tEJKC3H0lE75zuFxoK0SqhaGYzvxBULFEIlOM1vQzl7JEiRbYrGYn5qFMUvG_EgWaeYSHqsW_T7RYE8ywOEIn4qZiqfBOgYSerf8TZEbmW_Z87YEz9at1vahjMMvX7zU3rG4CQG_WL_1L7bE_sp_9BdfjlgvaVJhblyhmUgh.5PKbsfYcneJctGKOQhuhXakfTL5fuHc8LSatY7lisMq8PQy27bNpVC7476X8WCsPLYspiKqiS6UO2F4TtC55SmSWtkeVMxwaOdkGCxtfoQyJkzJsr_YuBmcbXQdr1iHYsrc8qLVQVzfNL8k0nl9zNs71reHIPIh_njic2j.BQO5nstLgxBI9x3NEXjd4ALpV2w2FndViMKPEv0Bj1eGoFK9hNpaBQdnmzvowP.3.D8cLV.yEC9LZkVovvPUGyZ6EEL_ACf7l9FxRuY6hR7y852PMDnS9zfoODeoJ7i9bnMEfEEhqa1r5oMmwROemGYsPIzoD7r1HM3FLS8qrb15OetXpMWbW.uLo_0HdCBMjgcw1vKo0Y12lXf_qZ_KqR2tyD7.Kh9MX64_EMtPLRBuGaFK1J7l82IgHl36QuGEmQL7UEU6QVBP_tmZJzt02cbHo0uDXzikO.pu71VBAqhEFexttajoTduTR.rrZiA85BJyW8yZxcxZ5P8sthc9n2fYCcQ1gyWJ4KfCQNzqQXtqNRWypFePqKuS1NzgIy76kz.dV3n65VBlJ8yOVwGxdMaAbtvZxHppqLMupj7MSKQQASVFs.0.R7VQRwtt0ZaU8hwWXqOpWZ5s496vuR_l9UwQohDFYNS9Sn5q3VzMx8zx8PQP54wVXPMo4IZslwiS7b7HWyui8y8kHaYWtsnQjjee_yzFiJGobIftG6iXJxtcwCwViG8OnJNTESjBNNE229IBaq6uU0PEW0qxrJwjEdsUfd6RlpiDHJ3QJv17K.hqR8AVJvd01LrsyQtcguZ7wfzpOW_ZlOhIbm7O34yobuSSaB8RbCoq.RO6CrELPO6MaYAiAPqGjY2ApdHAe0hGh3MRDK_kMEL9VhbfDKlpU.o9nkadip.DzR7PiJnRFHigy1PWfJxnXRrKo.fyyKJFUp3o2el9W8tQAWRNgisBZRffu7aftKCNALlUj6.2Ev7fPwkkpCWrNimPqIUv0Fron8RRngCWzcLmHa_DpNqptvuVvrW62UQSl6bK4187nqsMq5fNQl.97ni3orhpiY4p33hgsBsE4JCFbrxEAtygrKfxlTBn3HnC0M75mT27BJrdWdzGw2NMCxv4QZZJ1QFVmE9sW4WDjnPGoQaI02HtdMFMAh9hFCpwf8UtOmMad2OL_1R7Pqgfw4cErMshlBjbqmZgdn6zOoGFDJScuhS4vbCV.T7Xm5uNTwbTCnoERxHzl6FM77EUkUZvcF7HMqCOmnXF2k8_WSGigDsAbeNbPHAVUeLZx.R00Sx5IBgoF.YwQX2mThhRcWQSCWFsPYvTRfOgYLfWalsYTa8pFqK.XJw09fxDMhMWRFwSXMD0CGlmXLnNpGOzzGYKdohX3t5_PfsONNINKDgFNDJTI7k0BFNSMp.RV.8EeMQx6OjI3ZeE9vYxfvaCw0_p6r2I6IOtTTZ1G3JS4SFnoTaytCrvnCyBOS5UaLhT9gpAfpU8ZljcAuaFx_6iGbsZi2DJ_KbMZugFVP34cn8pfwHxXcoHQ_BPVwe8TARj"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fb18041f90e62b';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\/413777779780?__cf_chl_rt_tk=.yoA6Yy9FVr2elPZy9EJZo0rwvzqeh8UbGuYU3bKtsE-1739179966-1.0.1.1-9nXYpA26913BUZBSG69jrpZ6BFtjbT.VgTHqBwdJqyE" + 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