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-9018452367-gov.columbia-edu.pp.ua/post/962087173530

  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-9018452367-gov.columbia-edu.pp.ua",cType: 'managed',cRay: '91ff26230c1e062d',cH: '5DcaARpOsks21jxyjYtnmaNKDo8jx9kT95cUvTZ6KZw-1741906842-1.2.1.1-WkPTYoiCL2kp7kdr52SbJbXAwZAW0Pk0SR3RcnSKcilVesunQOOgB2ZouJmjlMFp',cUPMDTk: "\/post\/962087173530?__cf_chl_tk=4aS_dxF_hjUYLv8xdKaxxAJw9dkIzQcJrraR1Qlb49s-1741906842-1.0.1.1-sE4v4y5py8fzaUuRod.Tu6h.dpLjwtRnVN.D6hGy5hY",cFPWv: 'g',cITimeS: '1741906842',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/962087173530?__cf_chl_f_tk=4aS_dxF_hjUYLv8xdKaxxAJw9dkIzQcJrraR1Qlb49s-1741906842-1.0.1.1-sE4v4y5py8fzaUuRod.Tu6h.dpLjwtRnVN.D6hGy5hY",md: "zNPZBCJFBHVCEJQszTO_Ue8zTtIYisATIXxn7eFX2hY-1741906842-1.2.1.1-Gp_OKRnqpkgKstuo6fep3y8.kpsqkQyNGZ70ae4WsfDnCVYi6Ui8aWJzKAcAMVaJi7FZWT3tLDZnDFqRHSTlP4g72JUN1.h4LxSqV5ThHMG6OJu8seKVgPwlkYsO4gGeZS1_3JzZAH7Ljszvp4w_6E889xdBSbbfl2JWuMNCyxKcQlqM2kP8FdgZg1Gilvq6AX2ddOtjD.v4i85IaH8zkh_KYV6s0Rhhg9beYTuUafu8WH_yAY93nVsuxnxpBmblUf._dBBsChUJOuEheZKqN2XmFX8LnQ0KRU89r262hPewyuIvr3BQ98pfaRMVNFvnAArMV5PuFn6tOer8WBcsR42xgL1mGvYDeLKwbXlJcjgBFR4.M8bKHeWHgLvd3EgYaS1WP9gpMFzJgDh7y2GuY1YMzCJZrSyPK7Pskm5M9Kxdd48c8lDzsue0R9io9PnWseUapav_vMjme9DIVqSXdPew_1J_lLMurudXMgq8BFk8lrtSqatxYYoEwesiqQwskI40f_6g3DfZIPpG75F87dtKObuYIUPUxBDYeSNkPptnrMSk.xF3DOiOGGhlw_.QLFuW3P3dDITb_AxUDgWRFg2O.zcFtKFC5TVGKGQCjtVnI1FgxgzRJKWxQod54ZRsQHDAlPhfwdOkIpavr5rmjex7WY5l1SPu69Lxqv3Zk1OLKm1C_LbszdcZMyzyo.OdFz5Bx5J1PsLMrcXMATc40gW.OHUKNRI7lpl1vo6FG0gxLSvfvL6Pb4PgsQr0dtsET8nVdQMMcwJwsAWahsPFcCGMjtRWCqg2ycgTDrlDWa3SjTIxqsEqVJwiA_Uhk.29xbru6KXfMACT1JHIaSSUtEkE5TVUDxQ3z_ADxt.k1VrjyONOEucn2KhvGMXV1da5XDwNSlCWVb72rdFKVFKXYSalbVkern0AyXx4.w..LlbTHseaUwRflDzaJAoc.VU0dY.U_HBcTIAYFA77jEpbjQ",mdrd: "XzhdirJlejlIqAJH8KN0yNHCcCtUKs80hJoBpwyjsxM-1741906842-1.2.1.1-xT9YRwGZ9CdyCPlndcAbmJBNeFkQcswd0Cgflb8doA8X.uOKlqAZnfA_Qw4FyCjeu.haXDiMwrhX71g3QcDcJKESDdq.2fkoq6cfPGZKbjRAk6ZtZytqhVPYv1m.kc4bz3nrImxtJ2pQm9XqIocNHhyGpVbtFZhXghQSr1V0Dd5efVJg4kG5ClTThm_nVrDGXdwL8mPDDyfcHUzOH4tzBr8rS7o9sZviAqybveJRE_oG7u21UjJ3.E7fnzzPfXIx9sBLs9PAa8kZHjX6JvE.nLPyZpX43h2h4jwGg3fAPU6CkaMWWW3ySGVfbYhz7CPbvCPRwXASSngJUw67u4PLKIGX6vdEf7u59hKV8YjEBw.ge_nqQSLfOcIKxR8N4MTJ2rNjVb9.LAtWMr8siToY5oGJVznNiyQp7OeIznr8PoD9sxqGwGNV5Wi1GfYWVEQapDcM1MRcqacAyTQ8gqsUm.GYwwAICb2Lx8yS0.I3.QAsJF8KDpfH5w4orPM24ZgRb.6QLtyoX82UHHNTp9msEfhDHUsgOAnp_j8LsoxMiefck3XRHVqit8WDIlZ81aGIIaV97wmeplR0SxIP6mWHAa.vOO4YPztp5kBp3R_CPmJR0G5RGS2lxnwi4zeJbVOhJ6T.uqq0TSxf5cgh4fTgT6lGsaQgtlbTrcqmsZMZSgSWWuUs3ts9SoMAD_kI6xEXV0uF3qGQENNYbDyegqY4NbmdHJTL3knfPzn9YsTYUJkiK4AVKEzSgnbuu4cHExtripX9UMrhRLRBAm9vQa4wsdPfhzFLHcBTA_Gxz0lLCUQc37jOmzx8WydfWutuRCPxHb5U8Owl8sDaVb.e9_54FZypTlk0WIZgddImXVNw17brtprKNhqEtnciXOggLV.i2hIhUFX6aGAZv546BIlAI44jy0LwxotwwzDV5DtosOeo_xLuYds5E1.TAosGAcFVt52eDh_Q71VhwG.Zil6LjUw.KhdX5KjBeH3Fx159OidwsE7Jgk7l9LQ.ILvHajIfjvSLMajdPn.yzgyztA93G2KBdBedkwlzBa_IKwigXB1lvXTjVheSO2X93kHnCIFYNxIxEmIkke8ZL5ISJP28gsanxGaPs4StKHOmYsq.xfVe63vcU7ZfHaldMncIoYo0DFr_fSNKP_UoQhCKRiu7.3P0D7mFkJmJV97FcpjB8ZvZVX53H.ZZQGzEBoRnb0yRgx1bDh4sjXMAIbAatvWM5Wlt.2d71YEp6JPgqdkYL9n72iX4rHZ3SsSVOx319anb5Ct83_.QtOdnlGIgyI..jRPf5WklSfn5hht6Lg8UzYgxDUGwdTgBvPt.Z536kdQbr0fSYCMZSf769zgh10hZ1MZdc2SvH3oyZpf2Sug0sWa_9.Yo0N4sJn5iE5Ppd5c6Uy5DhDXH1rza416UeTf9tiOrvziF3t2jpXMEnU1l7HYBVT6PSfzywq6kzFQljU1ASBbRC_tQsXUUxUcODQzTYZZf8UuSy.M1I0uJCYr4yEwLNcqzRDbXdBGpP89E07fjmgMALLbBCCFc8Y11071rAp6yjneyDXw0PhKiaO0PZYQ8uosIDvZSkPGg4s55JJZER2Z9v2d5wzD98OhmGdigi68quoMez78u8NyupCFdNSarKJ513GSxPOIOs68eJg1dkpbLnvIYI.Q8N8JaxX9VdGPZdMloI5dfRAO33q8Qo7SdAjgUbwMakgX8t3guPZss_f2dUG2HlnZW7v9uKTeyDtRh4IWa.65CJ0JIJp4GH1jQy2eeCeC7JAW.m3s48UbOqSK6bsnIrCJh70UqXScP7bBo_IHeNERX9ow4jKklifVkAoFf1es14jaNkBujkhB9ooWVHdVycHAe8KD.WeuXnQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=91ff26230c1e062d';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\/962087173530?__cf_chl_rt_tk=4aS_dxF_hjUYLv8xdKaxxAJw9dkIzQcJrraR1Qlb49s-1741906842-1.0.1.1-sE4v4y5py8fzaUuRod.Tu6h.dpLjwtRnVN.D6hGy5hY" + 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