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-8952463017-gov.caltech-edu.pp.ua/post/828343948568

  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-8952463017-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100c2d55dee2096',cH: 'JqAaZ7bA5gDDKljSIWv2I4su8LCfn9WXKyh9F.feXec-1739239391-1.2.1.1-X91Lp483g2b1q33hnXZvmi9u7Es6jePR19LiELvatbNBRjoCqrV2ZL_R1JEamH7n',cUPMDTk: "\/post\/828343948568?__cf_chl_tk=VM22Ii6gSfd0B0B16ubI_Q4NO3iFZhJYQDPM8Rc3Js0-1739239391-1.0.1.1-nE0KPE11_OvUOBTbauMryc5JY_hRgcQHH71LlnFaNPw",cFPWv: 'g',cITimeS: '1739239391',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/828343948568?__cf_chl_f_tk=VM22Ii6gSfd0B0B16ubI_Q4NO3iFZhJYQDPM8Rc3Js0-1739239391-1.0.1.1-nE0KPE11_OvUOBTbauMryc5JY_hRgcQHH71LlnFaNPw",md: "VsKW.xIhuMlLNAmi1AymAIrS1ECf7UydSmbl04M3XU8-1739239391-1.2.1.1-J2Ezdp00nZcRISpB0Q2RUcTJ2.aWp58ZkZdxxN90BAjzNshWcZkaEEpWuYUXpLprnjQI2eCeExX8BoAsaDvewxBUdShOXlbkZGP495KcDxoo5sO4jUkkg6LkM8tfKqJ4_fSMLgpvua.VhfKB8CSyZDv5BhUko5u6IHcQ.ymKIkPG5tsNv_w.vjEwqfigcZGyLNIJ7sIzaMownnT8.WkvvxnI5loziUXHVK_Bi1b5CVax_QrjA1bj472z3z19h9QXEl8LY0cn.uyhmP2bJKx55HviUwFgk.Q0KNBRqrX2yXeSQs8XS12LvV1cLlAx0nYquoeI19i0JacOYJ2ePBeiCgWsJ0HF_3K9OznzFS40hS8f.7UTkJeC6RW9kpCFLk0HDRwRSZkuNMrTTl948GcMM6P1UJvub32THwk8qoSYtHzuS4ILottjCy39fJEGamlVeMG1symFsrhhKMVeZA4Jys3UrTrNmGdhUfVJ7cUMYKv8ctLDoB_Z5.a1RO_5v07tc3vTWCBRzyYCykurBbC2WK1rshD_lJIwl2kCPJLnK_r20jJYVmJnmcA2QjYb93F3wuA5iInm_woK2ARfLZGBm9WOmbAw3ObLWjBgJ8749Qkcz_5deqsyWlWwOXI0pwQYjQaEEYleNkPnQ6q0BeA5bYR23YNR4va47ZpcAE8ZAXX_sysh9ZOFCcZwAS5EbclUuqEXiiNb.PHlqeKryEd0rduto5uSh6I3TSwDPMxFBrSWw_vP8QNc5Yl9TkCtXeZJE62Qiird49vgHp1y5myJhP9g.fYwd3nLikS2T8zz5VzJVtwoH5p2r7u2gJ6yxDPKbByi.uByWmhI7R3qmsYbUFpiJhAMrGsxwPy07cnfYEebCpXhOk4agTuuN9Kn4wV3j8FCH2UUjD38yNik0bNoIw9mYXthqgiE_l74tPJBkgc24aaivNXkx3SG3XK8ntqm108QmAgPXROn5EXEtbGK0BO1K6OcbyKRLyqR1aMod4sY7BrbLRZBY1bRjHHa80x8S7laMcGbfOjNvNiBTSolno2e3dIxcFYHNkSSYJ3.UYkIzCumSzWoI8OFxd1liJsQhSj9Q.bMcRRe3F_qmfd0edSOo4JPxpWHN4YUVFe10jsBoJF3qoftyyVOR3_20Y1AFRTaH_OCIhgvX8JfaDpZ7mQ4IlfZmHRj5vBNhsCP42Ch0upzvPQyG1Z_HsPx7hYYIdza_iMOWg5BK9FOUAiT_AcVxYO1afm_gU.WyGitTQlRMil2jkRMRyvksbw7Vcjdw4IVkZ.F9laVn.QM1zVDMQuuz6l9wi_xBdod7fOQeXMputMg2hQLi_wDbuOnt1QOYq0hDWxq4TzcM246eYn8ywzUM3ya96ZJzm8BXlRQXWDzJCJxSHPtcoXM74.gKZbGymipV8xnhpckbj643iUrRXM0iwwSJVQQzzZtQF7YaTZ4c12zzlfJS5N9GV9WQyPSR4zBMVojvaMWxvAdD6_sODuEPzP5p4vMkgQsqogJnkLQZLX1bzUtCPN_ANngr_pGOvN968VA2YR5492k_ec2Hn3ZW0OKJ92W7S4hxA_y30rKY8zSTje3IMntnVewBoo1eemwomSxNnRiYEFm9.YRwqZXfQYKsDrpPSro45kkl6MOK6IKudRI7ddaxag1jSp4jkboFAZpzWGClrS_47pYmWJwjMAjSRcPAQuZAJi69qB0BOyVmd6uCLlksT2vb7lFVNhn7fSJkniduT.XHCZBghiHTEdDOirr7kN0Oe8nxPs86f1v9IaVdd8HUurSwi_9pyx5SCsZ.X3Z8uzz.a8iYqmIJVqmlKzd4IQaJKVoo85ojjMtoUSm3hnQWTseZMsulZrQSRBw06UbdVCurEDMIKXd.fOcZbDtZnoa8L3QF9_2toStEdeSb2oQORKAvyi1vREA2zSXJ1fiL3V5dw50PRfr0_VHQOLUB4ZULB.MLJit1N8ovgGRMFJ.ljTxUjkAQ7Xhv8TWrgws_7s_mFyoTbiwK2nRNA.Iye7eQJfaalmuDjBqDSc2NkcwZFX8dJxAt2zb8YVd7nE_CURKoh7BXVM1do85Ekovfb_gxHNf1sLF5nUIhY2cZA_5tWSLcY.YRN9knriUGs2QumB.CV6zikjHM3Iyc_lrlSofj5hiQwueI7vqcxg97wvGAW0TPotoNGHGoAO3lUGVDzMMk1OrLm7m0l0hoJXxRprBhsAkD0fWXUohFf6Gew.jvBkzZSMLMrJFN_neZPNuBNxSZm2ZzA",mdrd: "jDOIXyBOxltxVso3o4GCV29Q3Dh.Z.FQ3L.IlZG6iCc-1739239391-1.2.1.1-cdE7oqxXpkh7MUpq0RczvBcV8mU06ocHp8sqiuZhS3sgYDzavXjpFn_wl7Z4tjOnXvkvzw.iWgyzzziAMlCMHyAJS5rwU.417qrbyoAdSAQkbkDM4qI8jOS.yG.Kgj2KEUbCHQbMfEx7S9vhZuegmbXUS97Rxs_cKIFZE7Ol_z2zOUTWMjpqpsWyIBVDkyfSRSLNOSVXMmKldppq8EO4ghiGb.qdHgGha.7TzXNwOv7oGxMXcUqvtH0zFh8irW8nMGfRL0wnifo4uJCyDrXnUyQObxLkn3AsKbFIXvKfPOOtsSRnEN4NaVJucj1i5g_UcykEsxj1LX7Css4yjGwXc7LWmxuAYXLrtFFqiczA_vhp.OiqtMaRxZIR6bMdZUdxRz7i9FmeieE1SbME31B8PL9FJjUYPeNxy2uSZchTt3AmCcEdOBB1zh3W12d6Nstx.KwfDojgrcFni6fafItVz_zfD0JOpwm0ARefsrSYwappmCGjv8SmAvJUCFoNe7VZ_hOybkic12qfORd6dK4MLhrz2Ix25h6LUjT.P54kQ753Yirlpcy.Nfy3sZFI_49qqbGC4fvwgGCI42zPVcuK.CLwH84i8qYvmKDMzFDQ0HCxw_6NcN5l7iEXAXdoiF6T25WgHdHr987pL5tKqRAKqWQeMbQV3f3zRSM8XnfRawFG2u65wzaPgD8nm5gSWMxgMYmKY2sgZNi73pulwuiZaJsi69LFaGj2u342E7sZ7XCJjBVJWJuDGJIwYp9WASvPorLiE8ZydJ7UOjhUcu1yYpHW4VXHX32YF8GoAlsXqO2cxBG0kE.8OkKORvZ4M0A7K8FWq3va1AXmMcegV4SoYGfnHCz4.5txJYz6IFp_kEv_WMhyAlz1GB26TK_A0Amqo5wuFOgkvtjfsKY0yiJsdv_6HT5lp9xgFkLh_npo2ImMi.12p.CNuUpLCCNv0V1c7uHQbhkAYihsI2Pb0n8O8UsffVFqCYNH9TcccmSjXWd5Zpog2eW5GreWpHGePtW.zBFztN5c9rzcekyc8MUM_Vwlmp3bWsonCogLB0JMafWcX2sLFAkqWoOPVG4ZS0_66Jy1sNVP3ZRO7bEChYNGyYyRfBTpEtveHas2ilVhr_JNy4l7HhnTQUgxU2sRa5oZ_4LiscmYfKcUhRXUnPqh.UDt8k_054bvD7PEUoAejWrY.jwLJsD66saEaxaQ1dyQx0gc_qBSgdFKH..HujHSeYvg_a9EfH0G2DXg7IO4VDWO8IxXZUBmJzYQa1w80nTAMRsaGYIxYTwmcm8YC8ssk8TCBvpJSEzudzeSzi.hEcFZXnw8CBk.eB0k0dBgCI2jj5YI6dNNnOMrwFx18VwF7dVtafNhPJEPy6LFrdBaQF_wSm72zpBKp9wOIvHpw7VfikIzDCiQDN25IT8wj4S9NQpEE2T9lrK.IU3tTR.cxM30l620WAUm13oHtLrqOfjnvyxODdKSDVyGsOmlXbdit4PK1cSQA_k2n0446Dtnwy6TJuL2s9kXE1bb9pHicojeqnS4gdygMsTOcBwWJQiWyMJY0Q9XaZoAzkY9985k4jMteFCa6FEBbhZ.zTlghIl4fh0jqEom2e7CwTkhgUAdJc0R4y03MY31G2RAQfK1ANl.zSOtzCzP8gQQfnKywbICxWT2PCMKPQoBZf_akhUetLo0_hlZfhKcNeM7RUIMCo66NQnWhZbrqV4lzf1fU68_s56RnuFUY4zGN0KRduB6zk3mc3om1cB5oIlU97dqLASZ3W1fKruZwewUwqoENACGtrZE9LDXaw0FFGkOtswNWYkwYNIDxES32lwZGIqlKnwwd7JqU504UUAVhFz4e3At"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100c2d55dee2096';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\/828343948568?__cf_chl_rt_tk=VM22Ii6gSfd0B0B16ubI_Q4NO3iFZhJYQDPM8Rc3Js0-1739239391-1.0.1.1-nE0KPE11_OvUOBTbauMryc5JY_hRgcQHH71LlnFaNPw" + 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