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-0694132758-gov.columbia-edu.pp.ua/post/1462937058

  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;padding-left:1.5rem;max-width:60rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{line-height:2.25rem;font-size:1.5rem;font-weight:500}@media (width <= 720px){.h2{line-height:1.5rem;font-size:1.25rem}}#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="360"></head><body><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-0694132758-gov.columbia-edu.pp.ua',cType: 'managed',cRay: '99b03d1ade9d81ab',cH: 'hHSacQHV8H7yfsDVtJCbDyleUgXGOPbj1y9haKmcTEY-1762554244-1.2.1.1-aoamTHmm4fLu6mbdFidjtq6.PLo6TVTa2itMRcDIDv900EQYhlElXc7FpFEJVksc',cUPMDTk:"\/post\/1462937058?__cf_chl_tk=.aJFcHWzej2RfQoC49YqdTKIu2Htd5vdWz4NXlJ4374-1762554244-1.0.1.1-sbGURQZ.V.OEWGx3Xshmwf0JWov6VOGjyJXXQEnVmjI",cFPWv: 'g',cITimeS: '1762554244',cTplC:0,cTplV:5,cTplB: '0',fa:"\/post\/1462937058?__cf_chl_f_tk=.aJFcHWzej2RfQoC49YqdTKIu2Htd5vdWz4NXlJ4374-1762554244-1.0.1.1-sbGURQZ.V.OEWGx3Xshmwf0JWov6VOGjyJXXQEnVmjI",md: 'Bs41cm2jkzVmIp5O8IAkxrNkKUwCmhUuE5jIuCWD5BY-1762554244-1.2.1.1-zj1NJddzpg2gdxJJ395aYVygxNF_UgUBAdR.uw6cQmmqFFr__sdrUIeNsCymw3pfQxx5.v9Kfyh6.2gr4iQhpUOb4ziRm1JMxtT93UxBs2gzgbgyAVKpPysj9V8WLNxX0amxcGRwoILnirre0K3q_YzCBy3zira9JnTqUBX1EsTlWIkFFh80dpcmbpl1DQhgHBUF638yp0OZ3VyWO9HiHDiXGOCft0daquvOcIFZljQqCB0.DKAXXwjoQoPNXoFib9Ez.290WwKMFplM_sMNKDpTwCHyAIE8rxlxNQN3MMUWOnLyxyb8Qn_Vg_EduH3mNQdAJp_DWcfS4EkLL1hOHqDIz17BuiAKpi5.Thjinn_NfaR07pzmrhfQNlUpHCiQ7PbACRty.VQaHJ__VcV5xgMe08N9t7LGAht_KAQTQKTL9lCptKSoE.GRV0Mpa_w1OwQSiZxZ1kMk5ImUAdLuUSoO6z12wwSJ2pCmmt4Nmcasrrls6cMajq8FFtvz_Bz_GwYWf.SwfCIl7QfDWKGBXpABMEqw_CLKYQkboEVlxWYMMdXBbmcb_0.u.2kswpfF1PJznLdbtNZkq5n77PtvgN0YZ44_ywyM09CLEqtskYa_F95f0d6F3T12ivGc8Z5Pl9XvsQLvmw2NgZFxEw_bYRtaoFOOmY88CeCFU8EijTfRssH4sDUyySm92vTH53.i97g8siQJa28u.K2f0ZPT1QqxjoGk.j3cDIsIm0A8azBFsrKXR7gwhM10zp_0fG6zvU8zLIlIigDYC.Mn1SQCVE9in6yMIKOYC_9uzmbKHDyDwlqp7Khk8c0rznp3V8zN9BvfDTZ1lHXXdCpAVxvW9IWaw9mi82U98FKAAvYoKXw',mdrd: 'R4Nbwn3v43bfab.I1p232eonp6W.BZn9sHaZ4N23T3E-1762554244-1.2.1.1-4Nm_CJBRfSo5jHJTlYo020kpIuaB9k07XvfQcDSLAGckV0_CTwKj7H.eufY3_BXQaqRmO2CCZ6utVhvpppV9vhV11G22nlKyAiYH8u_v9fMbOrazYMviVk3xj59eK4WDlhETKC2UgAqOUzNseODfHcSQbkBVlY8_SGc4i.iAgJtAtrqZTQXjxH_NKabBeXzDbUXQncI2X9nnwpjCioKwiUUN08_tadMi3OS3LfZpisAyz1RmIfBPnvHsQ9DMXEdvsPXLsPdWiEgbgleDJkgJGJ4TUgzDaxr0mrmEmUJ2TKwJw5_4M3uVNbtUAQ..MuuK4lbVpmZRUD78YDPTfE4e_hOW.EGSRrtlqt34xT0ISY_CMOfx2D1hbVhnBZR7KGU2wsSG1VwZj0hRcd0HO9_V.BgcCGuVEzn8nsYZqcMT7nu9wuqtfq80vqY3znVYebVwWkDdpZHBn_dQ21bmt4VI38fpokwho9nu43No0m3lc3i5hjcyoFeU31gHHUmh3Wd2fsIM7EUM0ZQm43rZS6elLezVXAcP.DIQs.q.V7Eo20nyX1tuGojMFCLuvuNVuHRg3rffuMOF5psjdTWM3Tyvs5mpKUsEFFTRjzhc7pyYB6L8PEmwrlqdYxaA2Fqjex1SPkW4etKQAOFsP0W__.7WUwfcJOyv.F19nEkibHOU6rE1Umnbv7XcgII34LE91o435R5rHxZ0ED6DGZYbueLsYrZ6d9jTE83gBqk_KBxeSzzSV6GgZowDoNIr9BJp1RvAxe7K4369nU1HuwHtwgv35aVmMQ24oNhti0ZhVQEp1t4cMPNATFP10Em2h7jC0dYIsUpoOs6ezKBFTn68.votFg8FsMDn1qUB_7PTmhIx6yypdwTiR2oLHKyIKx7NLP71dt1FQ1IR3rkryvH8AkOMCfWzZFzBaqCOrtYr4f8HlCnrmCuWXkuokdzIQYhRe1wHdUSLmoir.j9BfqmfhJnsdbzU.gsZqC7qUF3Lzf0H6pgGKG2jY1LFNVTxpXjVyuwVR6S6vMlnsa2LhngCRO47fnhZozmaGxFvGOTOnPKl0rlkMeOkNBw7Cj1gy.VV9.A5nOn5KlORAV7P4oWiZx4s8aWo6dIaZ9vdIGApwTnfbLrFwElgVSEaMurdWbEXALju2dxaz9ju4AsCHYhQQCAXcP3mvP86aDuSLE3OL9Q8BtzpK7JwNhApGb6hJMn6.nqH4B23DV.9sfmeGZtJfbxX5WNz9tlYlU1MbyBgG0W1gEuZpEqsY5i1dVGbfi3pJiw7TxjoziUmvJV3l0m.ejJef8DtBEyT3RbvTGOyD1ybZ1g2NX.EkSWtYjcqaMNnuHsp5l8JZEoI5_rTjxZVaMABknc6QQHFIzlQnsAjOJ3hV_YWAP_RkaS3E4liOpJ.yS_RXSOWB9KEQyJNx970yCTec2U8zZbLu0pZIIVm7QvSSKiyQlr1whdRbx8R3h1oPXkCUgE3uuoc290aWArtYlyfFvNKp32bfvP1YvZi21XSvjh8Fmv.KKibvCrff9BC_MMTumSjW_BjotdajfyD8RbNLz0q6NkInaQ3g2W5qtAIIVV2QEi0sAcd_6UDUwXdqRMqUnCL62nWkLsetfd3tiQVsTqtYvUwjlwEd8TOoWyOveFNWiU8591ngPpyJ_K83cOu.Kt_smlR1ZX_M90ZlkiZi6OR2UCkJOChJOVChZcKb7VQFHveGQ3E6RFvfbHwhneVZiOq5MhZ17IMjoNTdARAyJPyMkFweq2eyvtyz7rnvRk_hgc4cW9vhodkVEkcyTg3.VjHfz_4mNbvftzYotuuEP23wETor.7J7oHujZ6_415EeGvawnGo1aLX4zed2TSxlRV3ZbmBsud7pfSPqCkGVKnS560ahKBvs09x1QaJksJVHockaJojao9AX36RobFBnQ.c23CMlZ0UfUJSJ6mO5KC6aGd0WlmhZ5sIrGquWR0YcUf4sN7UM0kRyLXy2WAZRLJSjgRBOc_22PO_OL4L523O2BGxTJVt8g0Ig7_ZU6PJAkBw97zvto1pIMZ2pBAe',};var a = document.createElement('script');a.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=99b03d1ade9d81ab';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\/1462937058?__cf_chl_rt_tk=.aJFcHWzej2RfQoC49YqdTKIu2Htd5vdWz4NXlJ4374-1762554244-1.0.1.1-sbGURQZ.V.OEWGx3Xshmwf0JWov6VOGjyJXXQEnVmjI"+ window._cf_chl_opt.cOgUHash);a.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(a);}());</script></body></html>
Copyright © 2002-9 Sam Ruby, Mark Pilgrim, Joseph Walton, and Phil Ringnalda