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-1607839452-gov.caltech-edu.pp.ua/post/387906516592

  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-1607839452-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ff1a80de4357d8',cH: 'T8oBkZoNKTBJnQ2F43O3JXLlWENEOhHWHjKz5gDx1bw-1739222011-1.2.1.1-kUWfQRE504jhnbgAUUItrimCPN.GA0wEsKsSXa6w8wG_eH5OS.HVw_HtcQvzDBX2',cUPMDTk: "\/post\/387906516592?__cf_chl_tk=NmO4CIq0mgvLe0RjiIXijkNB5Vfsd3S0DnxXx9FdT8c-1739222011-1.0.1.1-Oslf9dI8bynB3VAAIx1Hx4eKmT936h9KP_CHkROCICc",cFPWv: 'g',cITimeS: '1739222011',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/387906516592?__cf_chl_f_tk=NmO4CIq0mgvLe0RjiIXijkNB5Vfsd3S0DnxXx9FdT8c-1739222011-1.0.1.1-Oslf9dI8bynB3VAAIx1Hx4eKmT936h9KP_CHkROCICc",md: "Q24.ON.6cJCDHJBLs1_tYXEIdeHHwKe8K2bSGxIQBjQ-1739222011-1.2.1.1-.nn_oNd0YdF01KUhoF.4YFyV5DZWtw_c6v._BV1c9RGRKh8.IxHOzV8kfiaBk.JVxd8.tCl0U_rKuSWpnJEU2dwnc0ux_U0NMY9NE4FRwmMVxjnWadwhEJgM.TePD9OdG7UN7_SJ17YZlgWPWeLBQIbAqMxTeNOROJ_c_xvT74iofJb0EdVkemd9yr3fEkbaibtCLc3pC8nteTvg2s9LNFVm7Tl6RXJ2y2pn0fpYKxNOOhmPam5EFO4BvLaZeA7CAkU79N2ZtFLHXIymvS8yrUyZLvjcYhxjgv8BUk0RZ.XYzpeFUUpVdHCLSQjH0d6Tu_NJzkU69ycQ5OZqQhWROdYmXWF6jdix8wNvjewesb1aTTDeXuJrT1Hg.TxTcFG92_Cwz3G2keRt36itl0qisS_FB4CxtcEv072T5WtgOC7PWYIMCYiX4vYJve1gkRCx06QP5OdKF4XE8LxIp4ruyC2QkjqPjf2t8CBj.E8p.QhxpAKs4fCQKna.bWpFBOlpVVwc6LTuuCkLvxCTQNmNwkL_EhBj5ME2aAFldlr_oft8DD3IXtr_uTjO4g1RI.wBJTlhYH6DUiJPn9y2dfNJBapVO7pHa4cJyc6KJC1qkOm8L0_6QIcHKXCvnvL5tmDJAKPOyUwg97a1Nn3R9.rhJ_3dLCrxLebWWFiLX2XU5JY1kC_1B9cftAMF4N9rSt1LkJSLnxCmH6SeV7XFquUBc2hf3AkslXUK39PEzwtZB8Oy_NzWy_h.9KrOSmvRb28UNv4K3c9XVNC1nLPfV6RoXJ0AnNoBJV758SUj8mkSdIaTmnbMStIz0.NDvo8agFXCKZoySMO3wfmClA2DkbuG6SAOZ6xZwq3luP43xnNxcv_h28PnfsJq0Ry2fnKLHhBm3pA2FhIChOGPTvlkQJqgl3z2wZlCCaC2Pkto8CO0b5iVw6eOlw_LfJcCdzV.shvPgEyPJIH6d4Huq8bf1aIS9GqE5AkYXsdJq5d6GqDebr8a4Wiri8j.eV4.ILCuXsAW1mmN6n1EmJpaOpMvthXEBoHhCGQ_Sr_Ya0Xp2uV1zbMlWjQskckv2o0O.AzPp.H3Hy39Qz0K7..wQinTDOk2UK1p1rFSGmokqJvq6DqRf7B3K_x5L3bBWX9XNpZ.iAKLe.fwJlXltOxSKVnuWIELHRNf1tdCdEM9c0TulPL4TZr6fiHpd2nAHXI6w9.gNv5a83JGxvtKiYt9UtUA.xQDPLIf5N_rOWs0cWDWsnxRnBrJUVCzxU.oCDEw.8cdbJ83ushaQy7k2g.0id29jThsytkjeHjt0OgmunlE8Qzo4V.lQLQkg010uRDMALxG.lzBC24Bvx_cyO3VFmZYonR1z02BmBmZmB0YU67mUQxKOKmIga5Ldp0oIcDwoAGejFvktlgG0MYFwcMcmtxAxbL76dqvdrlGmNot2lX1tbUvg.Rj8bAuvmpbeekM7TcEQGD0viVc3iHeg8ZZ2UDIOiUn5ZpX1lggU_WEab6QEceyGW1uk47KygcYIpzZppQEuRqlq4J4yorPvlyO_UZyN3R46buE7nBldqr9BViT.KCdSNFd2_dPajMewfnUfrEPwO5P6fL5Bc51ClKlLCFRDK0DnhFQVuyOBxL7NouXLb55GwqZxq05jW.YIjUcRSlQMeDvNfNl3m8.j3exX.F9VQusyq6OyN5DbmGV_0UdN5qqv2VseNdRqPmBLVTbR4mwGYzjthvVkdkCLfmAP9Wn9htfO7063stORzSniEWD.hR1IqnrntO7mnhasNePxMFFpF1sRD4cEN1IhBPioazlqrg.79RbFkM9ZBO15Gfy4r52gIl_v6tZ081rjPtlqdFAV9wt8Utb7mICPWGFMth4UQoLa5C_iwM2DnHeyMuoUescq5iJJMrUhR59HiXhe91Zyx9042ifZSRtobq_jHMT3_XwWgKCNBQ2ahLre1Tx7CGzqmk2mpIl0USccPbVJAODNq.xmSuC0lni2r0GQZW.x65.spROouMecYNjcmAkgPQMBlY1DRFw.CgOgkiUdHdGkyzvfa6wA4_f2wOsUR1lCfZxAzEf1p6gHlkneQOIHBaRfmp2T4KWFbCT7g.Jr4XXJyBLT6fSgpNzpVqcDUcmlYF1V_wtSJi1ZuLzIz5.qUJ87tNi0w_vuqL5biPiE0fpWaig3K4xJSS7QpHco1QXDaPjqsYaUiE33ldN.ieU_ZYY.FnLy0K.X8iFnCvD2.ll2sAMzK8G9Is80gZUaUymrlrvFA",mdrd: "u9l1u8aX31BLsLLsPf2LOo6a8zwmNoPc6ljyfqyp59Y-1739222011-1.2.1.1-MNRZ2m9ZRHvMaRT7nSyAfZTYdghaBRgcTdqUBVma.cNAk6OzP57DjnLaGLG.KKTW5I9qG01pAaHoBYNI8hLRaVFFfQ8gbjZiNeFNXVNzWZ0bHAeKTO2ih.VA42m93Z1sKkzh8cTLCpeMGp4fV4gK_okGzD_4AhuYOCp9IrAvisDXk20D7XXSJJKODUPqZA1AqfgF6xNQzi5ghmgefy88pwglAO83.hjsleq34efiFwji6GeQuBcfgmaRBQq_sX1BZAmTzrK2_dWbgqzHRGOVhxR8ALgtuCjD2ocq0vcOrBxFmDKDcfPeh9remUPqgo4H2tfqLKEXb5hWQq0sWtsUxdRkaoy2xLWs48k8NFAmOt.3nseVpiLtacl6jwdiICZD9IJ0QaJFmqKPBgvVas8EkE3G9bHecTgpzmhv3X.UueoZqCZiPyRg_kYWNJ0udhKd24c27LujtmkCxzl2JYro9.0ha3ATeE8C4EW9l0HfvNJ1UClNnhBwdmqZPRilmOS9mFnig_9eXOPtM.0kRGffKPvDRZ.sRg6Lxl.M1PhrTlgQQNb0iWoSoEVWjLZ0_XzeUFn6gRgsbxuko2_0KHdNerX7kEss5TNNelQ1VkDXvL0vPCgLTWOz2c8TQ7r4hCkztPpgWAcILvl0yz1oHIHxp7fuHycNZlRkoMqCQbU5fsnfJjSUbcbt_0rz52VotwPyCPMxlHVrNcDexm8E7dgOBlvKowJdqUo7Yk.Rv_m4DVxVjjLjjOTywlei7Oaa44vcinZeS5bzAye5D0x0LjKops_QwjVMleultC067zVjal5hdWsX2Gv9P7ic2FmCNss2xdTtk2sLX5SyLvxa7FhfP1yx519.piFFn3fB4YA_1nQUArlPWWvi5NUV6QebUeJBGfcZIfo241CyJL9bO_EmMG3sq85rgx0A4PGMsHjVgz4s5utphSsy8D_MmPUeKF8xhZoOfgk7bPyh.gMTKgRTo4xU_Fsx.T2gHjeC.hS4tLYuH8zAWdzzUOGMdZlXbjZBT8G9v_hdcVdljJkVa6_1hkb7ls.NvTtmlv6ApakgP8iZqPpaZD5Kb1KKnCTF.rm2gy29jgg4Oh3w88.MgBXoJitIVJx_XVm76dpexmYpsMiQlRXFYriymjAyz0nfufZ92GdDNqmgPSA_sB6Zdanze1N3sVR6l2bDlBks0_1erWH3QS7PubJdeYoSJC1LOAj3XRZ9k3P.nBtqeWFRJcAhK5x6cjj5TqHnM2RYM27A3rwWyxQeCkmylhBqGrcQXTOixpm.HO6fTBq9DiCmVUM6H4LPHIhWmJ_5vvSwaasvYLcUdza6wR.SHBLR7l4siycZd7ovmGGlNqrnkK0A5HifKSc.AFyx1R4KAFHnoV5c1JmWmBo0DF.AkNUH8tM4BsJ72XpFp751idweq6KbDRF.ef9up_qZyXoYzUw_gaKvI6PmhIXHIVM3MQTMbcp_wf6mj7nObIQMMqAEabuWeMoX1t6OqRloa5jTBY6cBtG28CbvhUWy86ilBKkeJGH2Zz_4rLBXt3zW9q846rTuLJ6IrP1OKH29chQsk8eMmfkMDXL2IplgEfLWdu8oV92PcD3aX4SRGOzgNQ0th.qaMfYSVfbLH5CqVeoJWDDhZLSmRpN05slVkeca4PDK8roSs7H6gTNUoQuyO4vav1SQdfxl_UgYq7EzIr8FoTFjpX0z4OY0RRdiLBeb37unZHCvblyubJrpqUG9IemVP.dVC6RPX97K3UxgmxxpW.gtYl_4JR_ioh3WhZNXNIyQbNj4Xw0FB09r5ceHwK6VgyZgorMnxfa37p62gqSQyB8IlSXCD0g"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ff1a80de4357d8';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\/387906516592?__cf_chl_rt_tk=NmO4CIq0mgvLe0RjiIXijkNB5Vfsd3S0DnxXx9FdT8c-1739222011-1.0.1.1-Oslf9dI8bynB3VAAIx1Hx4eKmT936h9KP_CHkROCICc" + 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