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-5491732860-gov.caltech-edu.pp.ua/post/5491732860

  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-5491732860-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100de2719ed9c36',cH: 't4KYxIB2grtUZ92sXa6QRVBEiCYlZ2agTPyuZMn3A9c-1739240510-1.2.1.1-KBCK.YCXgrewOfrbd5.MvU.v8q7NDY.hCCApiG1yGjBnb35pAxWfkKYVUH9IJo3M',cUPMDTk: "\/post\/5491732860?__cf_chl_tk=wOl1nytt5dnC2i65BlqDgfTPAJLRFD3eny80EicWs9k-1739240510-1.0.1.1-_llPosoENwAjPe0tHCvs9a.8pZKQG7N_2UfDS_WP.mQ",cFPWv: 'g',cITimeS: '1739240510',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5491732860?__cf_chl_f_tk=wOl1nytt5dnC2i65BlqDgfTPAJLRFD3eny80EicWs9k-1739240510-1.0.1.1-_llPosoENwAjPe0tHCvs9a.8pZKQG7N_2UfDS_WP.mQ",md: "JVk6q.CN6.snGYdbt128DFOLb38cTGDQj4LQJ4WL1tU-1739240510-1.2.1.1-_Ea_Sa7ItF57VAPtQ8_FYehcX8ci_GPM0SsVdXXeymqShgXSH0sDPXAN3c0XDTt9YQQEjRVhyKppuU4YCHC.SG9nUiXYgriE0D1o1kdlUggU3ku1ZcvAaMcaEpwlEVK9hg4t0GLNMOs4WAqEp5ie0bBo68OsUMSKtzFO95kCPAHFyIRNOYswDn7JuqeqS4Ao0d3p4LcINdYya21KlvHSIa6gze8FLR.mDoTBA.w8GAjNAcv4maSTdQ.LoQuCCfAzaJkhfEgl6GfXH94eIuieVc92hAINKm4lstoTLthhAsiMcL7MPP2yJqLotndOIoCHGhEUeKl7WH39.hCvpoFSwa7X0vB.c1Xi_MqywKfTLIgqq7qdkRKuNtbsArXjVTYGdlmy5gMJh33gvpktCTFXtVGbIgq9Upqe72ogU2VutK7qT3f3H7199UDCLcHvXMlYeEWAArjK_8NzW2newr8Vek6Sgt.NYYIo1xLEOaIDyY6qSCkmphYGIq1DehjBNF.KmcYQJSrcoKwQdhUJ_vXYYolzNjKgy9E7TXqMGNavat.WAbnOyUAiz8hFi4_Sb4WYXv2YrNc4vOkMtDpcgJOZXsFhQy_9PVh2Y1wGayypZh26cArxg3wae1KcVVDPVXbZaweHw6KCHOrs58xM.fzaY.Pg7.p1XZH4VgntZJ_DwfmEKbAQwtzRefcvVGdngs4WS7mCNNJcQoj3T7pKBTOz4Bm0m12A7IG9F8rmXXWhOJ_bk4Gjq3LPbkkzZnow0D8uhDi2VsATxcnORuaLoaDoQRpRok7aln1E14gqmuEOSR2EGW9WbymHnL6nGEFTM1ygXEAGk6UDXZFlILPgka3Tp0L9wm0szyG2uwHboBkpNbiu9ZAtkjWSk7LBBEPWlIPq0jnX8dyP3E95.axFtudlF1ki5_XmeuLJNPY4iz5uvGg4QbpQgsyDi5DQE5rfkPzZf5_tXzGz961v6HNy5fmZ0Eq.GYHvziubtJL0pPkvbbJrP_VYjTWU7q9WC_FhaUv9F.09G7JMqPiDQ3IRuuEqdNIv.gjKBsa7MQuMjC5pIed2e7Vl9i7Jv7Moptq..v4Ls2VBRV5.tMuLcLzDRk9_2PvOcfpR_.2NXCcYXH.5ESNYugg6HfcAz6BaNO_36ynMKBbGD2MwWNB5i8z_Sgy608wt1OKU3lw.wMkPRfD4yN5hA3qxYRY840RM1VfIT1w9ysQoYWkvJsIP6ZGb8L_P1_5H0AzbCpLNn3hgCCtRE35muKoCivgqnVX2Hr5qnz2GcoaJ4Qxfpbt2JpBrDz.TknhDLBVkiruoLwq6X1Hgfs4Lz7nozLeGHMvzOz2KpEwCep1kgJkDd7hXiA7d.RTmRXSB_4ma5QHWKVuzRStD1GzW50bQLUJvOmxR9wH2l_qx5hTZEm1UHdOX0O.o8eYpaZNsCrsQDE0iv7jyRxuI6yz9rJPSIj3UEodxzRv4PYaCEPpNs_nvb3kXH0YX5SlqIq52C7ctSI1GPeqHLU8VQzelMvoQp.DfGN60Pp.MOstBTkE1MX1lOhi49Oew_CFfgDYjcvB7eayfn3QQH.uZ76zsx2eRB.ytpf0RkhZuhFJwIEr9B5OUm6mEJ7cfDtL2lmfhXvhLR8lcAfxWELgNQyomhTHBDu9.J2owRCIOEcPW_95w3fBf9VRPEJ3jt4_DPZOig9YQTTN6tE7o1QOM3.oxt.B6IEieKqvDah.wtO6LcaT8Japtka2piGl1cCR5R3k0pkzw1sZUGOnHo2bIdSuNfYA4BwS728GGUVeeoUZNNO5CEdiZymUKqvDh01YHJ6PDbDe0q6SDup2k2USdDFKHFi29BOr_t9xPZdVgcitAYHc7ujHL6FLYpZZFJ6_Vhzw2votz2XCRhBdbyCYY.3R.MuUooeihwC4JH35jBd9qCtGjW_vi1.6cJh_nlsHRfuBCSby_eUepHUe4s_j7rGv3nDULg7gRJ6j9KjfvYCN8vEH_8sGymNbJbOffdLfFxsh_jd44vr_d6LmiQCxb1I1hO8AqVfpJUkHepuAssuD5ng2GRFh8CX2eLgxhNdWJX29K_22EmZxRNarFR7pLodGm_9nxQrfCFS1dJux4i3YUBcupK.3F0wjtTOxZx1eHFcmAe9bePrjJoK3_DD0tHdXTyKLoGt4p9hNYe43CiNBDw4a.MQGX6c0hu55I49U4HQRxpH4Ikncm2sMTpYV288fLucPDT3rdkD7evEjKpkyLWhqdUb5ijlGuUNISTlvdfg",mdrd: "VyaRHZkOk3ag.BLcjjcJBrakTZzrNoNTIghX_pklzx4-1739240510-1.2.1.1-ofXatMOk_Y7Ad.SvB0O.m3yQIIuAMzpK3gP4kdJKGCnHsP_PB6lzIrMP1nz3yOkBZXBsYrT71OZfnTsikEossid2cu16VCjA7Ydl9Dz31wv6vij5tzmBoaqE7VJkIEGxosoV6r6lHO_AkuSe4YJ2akn._R0Hx56v9_sBuaNkEobccusZwM8SzpRi455N7_8gQQdL.QKwiUYYzzC39zmFeLhdD8xP_E_7SmnVM_0YV81vqYeV2iWC27vNZ7lcZzaGNSWhwW4rLLEyLVXoiMfaraV7pnJYGSNnrSLzVvgKCIvW64IKV0l2Sob_w56mkaS6JLDkrvfJlrN3po65W9VlobFQTUJpU6Rkgw1_D1xqgXcJ7jcub0qgr9t.FC9Fu9fmMRdbZQrKOCaYPBLdceDXzU_qEhDJDoZU17RruymoOtSrVA_OahJ7SfVCslgkE9G82ygvyOZGMUI398tQyi6DUUmySim6covV1nsqxqbKZQRQso8A6kMHMYr3N4MbjQEqK7Uvql0gZTTZLQxtaFPlfyk2HHMoEBLjCHlVjTHTrD5pbYZVa_Wy6DgGewcTIhbbC6ggLlxXVGfsHxm9oBH05Bsy9O65VaBk.wnWsHXBIxRpmWi3.nRDMDo_5Pa9B.1ZMBVD3U_wnfk8l.QIO.Wcz5qz4XVRMZrmnZVpSKOtwCeWJmBmRxnANyjLFeDXqqiMYY0aZSe1lk22HN4fVKivRGIIJWLeS10o8xxgPMwxV7Lz5APD0AafyiQPc0xIfNssk9.fsUfXskU1xieral8WuUQMhz3W0VcEo_7B.Ve_8d4O2bZ9tXMgvnmelM3K7Me1odEEHwDuy.9kLBIi9k7OK4eLvORjxz3LoAJYXZdbzmU_AGMGNGSIy7Xr8NGPBQTvGz39jfnWx4qExDdzr0LfW5i_q2YmkP4fc6029IQz5KhyEjW7Lr.UQ7K6G4ntzOymXcUvqjegiOUXvB3mwlFFR0IHT73MtCjuig.hnOOY82WnEtEmCzG5ejMp4nHC37.OmIanwS4fMkGV_Z6Z0i2ERZ9Z3Zdry.zSBaaQKE.6d3YEztSAl6ezzCOqwiUZ.20xwG5jb_nKrjo.Ua.RFNC1KGC4HoAqHYwMKZHdIs2k.r63YRT1cqGNPayt7zkWKvpzdliW2QToLMuZpgQu0.z1gN8e75soXmavnz18SRlVMdpM4l8LfbFKtd7BjsMz_iWfZ9mNzRu8Ddn0aiJgYmXAIbNW5s63GUNG3I_gEg35skPCOS0t0OAPIFOdffn.uWx381nyc__yQI9wiA.oeALw1Rh_V3BEN2CVDoc6OSs0m1FALIo1s7He9rYoot5huOP36ob06OXBBYrZHBhyiIDi2ttvLle3dfvFmAu.m6RjFOFl_cxIqMfHIdjeahEZCzCeazUp5sdLI5Fey6Vt_JLwdeAfcOQtHkumrlbHb05ICW1ec8iC0kBZUges3cjE2BvFqfVBvO7VQf4Fy9IrFNWl_vl2CMew6e4rzXf4XxO3W3CHA.p6UPKy5R71S_Jf3ziijl.ENEvPRVf1CX2.Ac1Aq2A2WGB8Pq076GdJBq.xKUuD12kXQ_Ee6ppI5THuT.dkFt96cqE_nJBxhoxfWiaFGDj.JjqI0POIfX6fhsW5.oO1qJTYoinh1oM_lBSOmidxjz5QX6BB2X1IK3uQq5..YiBUFSezIR3OZwlN9Z5m7TlZ_r0Vc6Uupcqpn4br9bpEy6PXNACOb3Iyfxcn4cLl73mh59ddzer5XjnXDnTFKQ75.0GqHHd2l59XbUWn_SpdJdkjZzzRMbX3LNF9_exAZMT9O_M0NdN9842FcsOG9t0JmL0GcziZjDnKJc17Rv84"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100de2719ed9c36';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\/5491732860?__cf_chl_rt_tk=wOl1nytt5dnC2i65BlqDgfTPAJLRFD3eny80EicWs9k-1739240510-1.0.1.1-_llPosoENwAjPe0tHCvs9a.8pZKQG7N_2UfDS_WP.mQ" + 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