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-9465380172-gov.caltech-edu.pp.ua/post/9465380172

  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-9465380172-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe90710aeceb01',cH: 'sKAWI552HQ6IWwn7plc2.RLUitNoz3CoSS1MABud9gQ-1739216356-1.2.1.1-fBkylAfgPIpHNR0N5FHyewLtAKzotyVUyGrJAtcaPhq3EVJE6OWEspVawiP.dR4a',cUPMDTk: "\/post\/9465380172?__cf_chl_tk=a6Z5UzfYdt5PeIQeAPJLxi.cCqCVHOGW544kqPvSZQA-1739216356-1.0.1.1-IdwkQc46tCTkJsz8oaPLlHgGgcx1EnY.3jeF9XMC7ng",cFPWv: 'g',cITimeS: '1739216356',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9465380172?__cf_chl_f_tk=a6Z5UzfYdt5PeIQeAPJLxi.cCqCVHOGW544kqPvSZQA-1739216356-1.0.1.1-IdwkQc46tCTkJsz8oaPLlHgGgcx1EnY.3jeF9XMC7ng",md: "ygZPhHrR4lLRitnCKyGSXZ1j5yB2RGpgPV.BBlCWJjY-1739216356-1.2.1.1-mxsS7gjlUy3nauIB85hWExDQMkkSjTSUaV41oCysQMz4.jIACRH4aJY1sZh_vAD3439..jJAK7baEuLbxD.wuv1C3yVDvS2X7lBL.ms9IM6cKB8KlhnB0I4pInsHpdUd_Md8oq_E.eybHvgvvhU5V6Mm_rtSvIhfohUvVhOXjoohuE.mzW7df0z4ubo7HXyftsy7bDdqZkfL0OKndVKc4H1Pn6VLLWy2yZ7nJlRoN1xIoXUBrZaP3CcA9mvQFpjbmROm8o03vRUB1zPmbMjKooInzq_9C1kCDKjjlH75Hm0V8j7VRWiorVJcpAKBdsgWFRHZfv6Z0v6KhaukXF4hMVu_EfmRLu1YiaXNxYVRn7lslvPuT3wsOOXiFCFeUWbOEpkf1ARQYwmOdR9n0C1FVUUUqriGk5MKSbEHGBwtsjzIw_o.XfUVbtCjDLnf_4AlzPc8.Sv3oMjUabQ8wGJe6Yx0LTZrFzNoywZ3arBtM7bk.sKYUDoNzuDZRGsDvFKsCeo.k9mQfnQL83QQdhNGkWbTSgXfwugd6uWtxHA_VrW_V_pa8LBtVBHwZBfw7ICR0VgKr6mmzb1mHsKBF3sKfzBDMW.ceTRC_BsU5R1k2e7_9Jm.3.oTDRByzLl._ERBRjc3FwTW9KBTPp1Y2APIzXwPIVjUthO83L_de3gXe_OD3oBcbbqjJ1gYkGOqzCiVQG.gtF80PVSM4EQsNuAodOF57LuMhfv8s.MTAqE5DYRdNWMVqxbSBrZZRLCRKjmnKpG.jpwdQ5ewjH4NBT1wlH7XcOqgttrNjjrOvtq4F9Oaabj4t7J47yHDgKAE6nsk5wHZRdVSDfN2OBPUJzaz5MdFOVXbDI8rmCtPP2CFejadOuteh4xFCN8XDoA2iduqtGsEWfuF9caUAvbomvrRXmUIHssRKwLaR_7LYRd81PAiR1I08D02yBkVlC_hkGJkowsxLHyhfa8yMAYh2rddAMd3hDp5YAih9E0iuobBWcLOkdnXmsX_2dVfBV8v8.ApgI51BESQybGhClZhBQTv.E.fPd04.SUJO6eUd8.wGGguJjP1N7gFQwuZcnZJ.bFW.aGAgsgL_844nVicrUQTtP8mQPsWyapH.b7qiVuIz1aBlH9eMQFf22TPeSV0R55Jn9JaASTJeKqCn6Aae9Ry.f8JAgde0.IgYUDmN3DJE5M1iktxbeP6boLLt7mD6CnUvwswcQ66gD4AhngouM8aON47z9vMzwmtd.DEmJEjPMxqWH6jFpmMtzKx7eWfnjHxazUn9ayOlyrTcKx26rquwmSntekglZFvlBml.iENVox1fpAkBRYThpQyll20osYIQ6nSUEa95kmZShNwJTCYKTUZkcTmbwG0_qrbCjB9WedRIM9u4P_Z1yfymTegedHscyXJTCEH44oRunlFoY49tETuCVQUMhktHAZxeKvyCbA7fPLnaEy1FcIDMmmVk8cmzqxuth2sDZjq_QqdVTJAGBqJqy.rm85bwu.5lFUXe.ajgvyHTnD5RrcXXLv_zRMLxRh5xja2B4jPKoL.fBUnIPBi8ozAEUM1Lz5sWWkKaXwUhQkW13aOwzGwciupyYqaSIvA0o9qUTlwsC1LX_43BScNflwnCcJpomLfRiT.285E7kHazUBfg1IKBaT38kgkJ0IUHxEp8U.vDwEGDoG8JvfJvPA6w.h03BfeZYMks_iDCJl9SLDtjduNiZ0Nj20Z8M5VIbUGL2by1pYwFuUzl.mBcggSNgyyPpqCeBHaWKTDK7MEluKvASRHUvnfcXJoAKnkJSrqh3bYDbo6nxDvnL57tQElxZdeN5ksDCRvRgr.fXM9UNwOQ1jyt4QU3CeIak6c88doaU5f9wi8JdeRWI4A3FCuFsBB_nf7ZJWrsK3b.HMDoQJWW39Gm2CgPHeadkCdppj42prGWssRduseHyM7LqvPe3VQRYbHUAK3.gZALxslQeQSGIFt98LetEhk6I0Jfc9Y59hWgymBt83fnGjgj3L8N48uthyNHPNmsZINPR.qtg2eI3ajqAxLKlg1OTJbeuNwB0IMGtzsHSsWoSlT1Jni9iU3ONNGKZIu11_BSJ0pnTq.t9KkLAF9pxzG8ZHHI3xLTS0W_20BvkJMs6YWzIMVaAf6fzg8gu0tEnq0A8.ymOzXe.A_7G2AvlEWv7I7n.bQgeOYXDqwdfSExtujAGqwRGqDt0bVycRZsG2mBpVThVfMPDbUi3IDNolPmKCqKqqSeautTgT1KpIIgA",mdrd: "0lM1o3c9CddPuXD9vZR1RwEpfqWyH2MEBxxJh4JmPJI-1739216356-1.2.1.1-S8qj.Y8.M7mXoGJBWI3HoUXgQBqo2j4HzKrMqLEHew2kEW0eOA28UIuSz3fwt_ToIY5WYL693IO4OGMk3Z88RRUqWTDuFWnRghwlyHL6k2RgHSoIsAU6n1iedHXeleu2ehEvUOK.dqWlBQSpZEth3RiGRxmNO.POyfFS1Qu2NUKNUxQIMuviRJkazjE0jkkuQuZLw1484QQVsyO0diz9ZJ4ki9yKh6h3r.Myh0QXo4V0d5g52lD717vh5UIvej_.qIgINp3LuAOv1kKhKG9Y7fZWLt9PwIs4JYwkuEq2ZyydGPxegMIhBqW3.wxoH6px9_SQzB_zWd8ghGrzBbYd49npF3cwG6eF.DGcEPqEAw6kGO8.Xvh1VJaasEhw69kQa_3RUGkRYS7PIVPBV3I03Md.p2kAy8wxMdRn_IrEYcEFyN1oQRkKHIERibO1LwiOI5cGhpWGoOghxxBV1URs7840y9ypMH0kY7glc0PEVJNM9XXkBptNWr9HiMGyADWYeO1sBHVu4y9YtdHGCn586PtzewUM1SdbdiqeJrSG4eM0kT48Caa9EW9yOTjxbFbO_T_ANkxQVY.4bx.OLods1cYhkuh5JlSR_aFMD5BakQUolCJu1.JHX_yIZxxGYrhx3b2tnD1OJgtp6FXVGwKlDTor_BISBsYeiGPYm.k.SEej6VBOeko56m6UAYSaN6H8YMm6OeziXjjtiIgHH80z6DJBzPNXwmUdzrgTrIYRlfKlt.1A2qDdykUwZnMCYAEf9SocvJ8Ym0aHpzJq3wVDwq_JrdbFI4Y7sDXi5xzS7xBY8gIVM5YACllUG1t0SFZE9tX2b_I0R8FZkhhdXPzZg0hNADaYldnuuJohrca6E_mNPpIEUYcliqYLsgaTszRhDPdOFP7Ky35ZeDMT7.wvZHj0O9_JCZb0i9wIs21YuyEOE.yd1V029LkpQuB5LjSg_G1TjEAzvtmBnCvj8PbJHFu6MP0wNzmOUEVKDjeYvmDw6jO.cw_DO9BK71B6pRdVmBpC9HR5xBGJSryO1oWAvwlDGuiSyzUqSsq90N0nNxNebhMFtYmCwRweyLzSFzwYYXm2T0dasIkF8Ck7bRbwDXpSVR2Q3ysGa9E5EkPxHk1ylypfeymyDaTmnOTwUo.sNp2QARv.hD3KMo.BdHWMAA9j6cnCPDKrqVqfBqgiNpMdvK.piE1vC9.mUkMtUcStGrQ.oY5jlgfR2GU8ty2OKXwMWt_zeXHvbgrX89thL905sQcvb36C_U92Qwio6.cwxDrc81veZNKAvXyRtOYaE5UQIqImkAOWlLke5g81HRk3nBXwBuzAurzMv.99f0klPiAparyrj3KeFPAO757Ink.BmuKfv_gmcyq5f76s6lsfj8AZoOac0NU1bTjBItThi4TNzNXyndXao0ob9FqJ6vCg9VvsnhZt7RVD0WBDAh9U7dLzHcGN84IfYEQXcPaWTeP7P_MbUH7RuxJL8XDjoali2PKIRoSN2t7bWps4CjxJDdryaLkoMaZShtCPYUuVSXGsW7PUMxJi3fUshqdh6FoRSjTGc1wtF8d1MZvhHRQjUpU.M1741b7o0._eQX5aqGT3Sswcd9gEd7Fi.faMrvHxiC8udZRMetIvYtaPOeLbNyFVYAET.JhbXXP7AU4IeYMszF8bbTAWgRngS.fUXm9aASZuxMRilV7XkuVbt6KCJchIe.uqSCSRhvr_KrepnHzfPjPLfbWC1j9gd8tzLscPsblIDWEFSF5qKBqAw4c_Gf0PEx6T2A5sfRm7UHGCXDwfWqvNJVM9wWVcsf07S5XqOTM1lMcw3t1JpkYg9W0ZoJIDYVIsHmmMtmbfnwR3"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe90710aeceb01';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\/9465380172?__cf_chl_rt_tk=a6Z5UzfYdt5PeIQeAPJLxi.cCqCVHOGW544kqPvSZQA-1739216356-1.0.1.1-IdwkQc46tCTkJsz8oaPLlHgGgcx1EnY.3jeF9XMC7ng" + 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