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-2768190534-gov.caltech-edu.pp.ua/post/617825659128

  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-2768190534-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100eb300b7a9c4c',cH: 'E80aYOgd2L_QYY0m7nCSIqY.ZMljE311jcI8ju5CbsI-1739241044-1.2.1.1-e62hkJHFGaVuQV_WNqs0dvE.y.uWOR3zfsaBLCm51D7d.eVCwERQERYK2DtCiYUM',cUPMDTk: "\/post\/617825659128?__cf_chl_tk=vIGYs26Jxn3SntTTN3l7bZwK1yUXDBKy7mxa__b6_oY-1739241044-1.0.1.1-ZCu8RqGU9Kj3MBfivpOAVf2XfcbsO56ctoIbrVaoAAc",cFPWv: 'g',cITimeS: '1739241044',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/617825659128?__cf_chl_f_tk=vIGYs26Jxn3SntTTN3l7bZwK1yUXDBKy7mxa__b6_oY-1739241044-1.0.1.1-ZCu8RqGU9Kj3MBfivpOAVf2XfcbsO56ctoIbrVaoAAc",md: ".MOLAw.kY0Iq0utKt7rmXielWpoOv25AlkXMgl362ZI-1739241044-1.2.1.1-UFZQT3vAwr1QWHbH8K6GTS4DOu6iD6Qd8kupvTQ_svhTQjgA2n63x1Imyq_QCCLTrAauoaJFESKxK_BOcqnyaXSngP7CG1jEbk5qcXbghdLh7ExPgBbvABf1xR1r9k.z7_zz6RLandeAIUiujxlBom6_HUpXOlJ695rh7rj4SleTMmbWTfhvXiciha7AYBRzUxfaVCG.EouAkq3Y742bW40lATWbzrjBZF8fxJSTAov_FdS6.534jPvFmjDsaHLzfpeT7gtcT3Yoei0lFiWj1hEeeDcKrd.9NcReaCewen_4s1wHrp6XBCNXcjsa03PidnxcZZgERjMHlt.smlGsaJk4e9DsHWklpIt7ptJneKlADjmFWva5Y7XIhznR.zqH9LAVWP2cvtwl.0CUxssfHszIx8GCnGxUtw51kWBw.zXTle66bfOItB5YUNjFqqcyMH1_EjhVsurhe5eqKMlRne3bwOVkSKvmFd6.VHLDfykOzAvPUbctQVomGGHgWZjTKih1oi0j80j4k7TfMljEKmQ7aLsEgn2cKqSwXE0EUq.TJ6EpBHga8iqsiEZf6RdCeht6_8KiFnSshShJfVQik7ZcXIgbJgqgTEXNQoGlcCJ6SqzNfo7SZ0q5O8QsMCJlXFD8DhQ6UoIYfreNawvKIYCsC.rBnVPKrNhzfTEasLnBRrX5fHaJR.b8exV8iRqZeqAws4Jf7XgCDViTT_et.KJO4UTH_LBa.bJPDn5d1jh1nUigphqVsjVvVyvFYmyo293ey5F0qfaNf_05Ce7tqHyJT2eJeaqgP0Oeo.ljkibgCYDLPEgdedPU9mb2z0MTFjaOYRG15Dc1SE70XgYdlH9Cj6j6xGjcD_OK5oF8jJe.oY70f6Q13oN7hUueRLpm4YHDBQrkdnWu7bTVExuIDe4EHesbvAcnBcobQ1_gR.1e5GzvDicNp7ZcoF1gsTboZtMzysVbQDhNpgm91jCBWc58uqEiubLPffmX5oLtYpbY7JAJHYjC.OD_VyvDPVq7gIFsR3At5fsmYfypPmnTfnwI1sezUbvMGawg90LE9gZaPK9QbyESChgYBrsC4Dst48wtdR9p2rQEW3P1oFBeXKFrfWMKwiSfNhLHO.dpiNMUCfp4fucYoazyjB0tLPyC3DJUnoCEieEgAhu10Y.C9ofjh1KpOza1555p2N1mP6U1bVLZWCVBOtuv2mnG2aG6Ed5nHY2coXDBQG9UUHJ9jmIWgaBfOLp5s0RXPqv10JYEnWFiKftzTLYYYxJ8a2vOnuDRHHmAJaqoawlV5X.skn8CLjgvjMMtaLtBBnOLXTsxVzwrZtDFCaBFGXzX3w8rXElf8oEI1OKbqo3mMoaGfV.ohl4EHROwL3FAbwLs4kkBI4FGFKJqo7zULBCFHrKSu87maE8dyOuP8D3tGECA_Z.iZKDtqCKT4Fydvkk9ltjDSvEcw3yA8acJ4e2GjKOjbvp44hiDJoHEYq7hn6JHn94OhryGugsWFhRdN5qNl94jZpTPvm7bnQ.69b0RnkXkuEahiliIcr4BNdNCWaowED7gDSuBIYeOUHB4YjaeDvt5gxe.r6zDmuYJSThDzGoGGdl_8Aue.twss1Z4fw0BMPQowCxJdHu4Ww2PLfiBguo.sY9_fFNzUG9EXrACX61ynlWNTmyHZt9vk.Q6.WqZ0oQE_wQzNzxWKkpFxx0sLytLl4Nl_RkOsvrbzpI93A52M4DLYoRxql0YpX6g6evzXGKuCo7IVijMI_xu_tObeyfpl.3qFpn5crPI.Spm3f6SLSZY0BjG.Z2K61wnYJjGTXcJnNgeX0k70pu0xXFeHvQlR7GmSLZwIRuiQ50FL_yk3L2TZMSvdT50kZiGH9dMkc5QX0XvGRQ.E3tXxqRIbZLxRjHKoWTMyUQCxFNcziHofU2Co9y9BTJHGECnYI3zjABvqQuGztrayxyzix23gfgJhmh_.jU1liLUIJbducObRF3RzVodJKKMfV2zU1i7TNm2lBVVC7yH.5.bvS9QM6WS52pW3UMy3YTxy7juzCVj.f8fvf3xKnjbAWhux_blZdHqCiC6x12cEFsahBO2KFul7bnzzajO8BD_TPOSWoxUdXKu2NOvYB9vs6gHxRsmrUh4EMwIqXFKuyzObO2ZMREtV9WKhMJXRgmzgoxTjVY.9roSPbpYdOSLepmby_GtxX5ZcPh.3AM2DN.oCVcwb_UUm7u4r5s7MBMaRYBSmJ2gN60vHoZLMYM7_W5h18gV2A",mdrd: "9jLBjP0c76OgdRGMmEWV_NxQAfeffEVXd_0UVlLN6VQ-1739241044-1.2.1.1-zo7A.Q9dMjvQXBqSIEpQSVhZXFpoJ9q6T5ERnw01DNEfSBrcX4mH9iiHkWghhNa_79wgaURhyeYnHkbaJF8.NDtgL4awVJa7cc9t6woGqRyaIRnSqRO5cq.vpo2RqUMn6GOqzUqwQCjtvb8zr7auXgo3c7KeeUgv.kBjN1cpZFWwVW8a0U4XlqRrcDPoQD3cxjsmMQa5qHdZoBax1kdVkoCKS0I5pXeYNAgXBaX_dKrgfsv9O2K4qbDBhGQfhlVmCZ0BUeLVTTJEDIhCYRfS3yBaz.t3WLvBkOfR4M1RywVYFxJB8f4SgQDjN56ZNbzig9wqv2xt5OtE9cxXMBiY6CetF6K9htG3ILJ5hMtFfp126ME9a1Rir9T.lTfmVBzF7JS3UddrSAjnunt7Vgbzz2pSyDfwc80T3AUia819GyHCV4HNhRTpAiSghKfdGfpNRRRvFoFVZ5J_QWi8xCR.c8Ose1hxW2KWP_foeLm5yS871kbiIbJihJX4NoWGiD_vZ9JA4CXmvO_08IHUfYnriy4gJFE8PsVlw.roCIRgHlWp.G1Ge_jQtwhI.nnO37dpNWehhG82IXKuW0PDRr5JD7IRXDIyexeSpuPu2TvwFm5pUUa9dS88Sk9TfqJdCWU_nEo4as7l4GWawsOBe2_KbVfRC7qdY30zXeVblsvKlsjKeTnRK1Gr3YJ8_cYz8lvhxTiDInx2VbWcvaCxcz8KQXxHdzMHvtpdfjZWKJ5Xx3zD4ligMwhT6RK_T_xXHdcST_hRSd_TQd5xPSUfLcljO2HfgdJwapu7_1z7zNI9rlX13KeLWKvBYW5jvyUx_jfmCLcW.._3XxD.07kJfbb.isB63i1UlDGmbJmbx50QGdjvgNH1FzN__cXsfMl92ZP6Ba4cKFh9AUloeFsISZhb71Y7444O_zy3xn3UC0h1bEzyn65RacbvvB66QhoqEH4zVGzXLB1udbAnFrhNmUybdg7FKehnfhWjDAoXhNuD3yO_Z8e5lDlsaHsUTdA.Y_QHl9kZLV4raJ4cEX3p3sZ0thh8HR9ToLRzxXy29MJ.HnPX3aZzHtLqYY4hlSrDNbVpBWq3V1KU_TNSgTfoS6Vgr3._jJr4_bQfjaxwfKPYVvcpRA6U3TvXctSWOPM2.qczGyujH4lcv2WynJVrFmnLo8lM7PGvme8hyq192iHJ81J_harwo.iFqdkno_u_3uIbX8PfGfeQXPlhES0ypmWDY2D0nFP28PuldXmUs9Te8rJhsR53NdoTiR8Cq5F5AVQpQl.XSbMhbLYCDv63vXdxc_XmO96rsDFHqA4YWuDCkTVVgO.8ahDuUlMdAOM09YAPGcHefGfXoCclpELaIepA9lnNdIt0ukudHk43svFTqRFpcWefiIt9Niy7.qc_69k9sdm8SepJnnY1fJcSaBEqa25HWxCpo0p_.uw67erb6nLnoLFTnsOZTFiPDDQd_EdL66BaHFmdf4PYekytuJzjKR0cip.blL1NH4JWUwB9uYrwd5VMI.oZAqiJ8TWP.pDmHBEHchq_k3dZNITxdUK5_lIaVKFnpdSbfTf8Jn8LL5snaj71F1lJMcTxXCrbyWeczIq36vjsmg33WKgTPQNqfiUOL.viIq9lT2MQqWB7OFNO4lqWTEieCVOiUs38lDud_3gMP9YlZqqfJTUHxGWnM_ypyo4JGxK..SRpdlR5ePIF5E.kJp6FpifZhFSjRh9W7wz6KGO.Bfzvga6z1H7onJiks7TWVIaMfJO0AEfWEEomTKC7CPqLDmxExPzYmW0dO7_ZCNlawO5RTpT1lkpgOjMs40Sz0e40vUVFnGnpi6EdRNa1k6UjY01wyn_wvHPG"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100eb300b7a9c4c';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\/617825659128?__cf_chl_rt_tk=vIGYs26Jxn3SntTTN3l7bZwK1yUXDBKy7mxa__b6_oY-1739241044-1.0.1.1-ZCu8RqGU9Kj3MBfivpOAVf2XfcbsO56ctoIbrVaoAAc" + 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