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-4072985631-gov.caltech-edu.pp.ua/post/791624927890

  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-4072985631-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90ffa767dd025b10',cH: 'nAciN9VnXpzWb9gCFSd2C_EZbukuCT_yselP4SGpg3A-1739227782-1.2.1.1-sbziywuQjUm2PxYIZ24w99F70bmcCSNEvdd8nJZt2mrKhaKcUPEOLoeVuujyGNnF',cUPMDTk: "\/post\/791624927890?__cf_chl_tk=Qr_kOagzUmtSYS.k1dOffGOmCW90YlX6o942Oi.D73g-1739227782-1.0.1.1-bRfwhg20hwtWRg82u.VO.P39_fmJhS048ocUBYsSPI8",cFPWv: 'g',cITimeS: '1739227782',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/791624927890?__cf_chl_f_tk=Qr_kOagzUmtSYS.k1dOffGOmCW90YlX6o942Oi.D73g-1739227782-1.0.1.1-bRfwhg20hwtWRg82u.VO.P39_fmJhS048ocUBYsSPI8",md: "WgAEcdIMhlYYvYbufk17itHtrh20P9WKLUHrkEJ1AhA-1739227782-1.2.1.1-oK4fwqkRbZiQ_cf.wjX4vBZIEG2iFHWtUbWf4EVwhI9O.2UAA8BtjaxNmfLN4_wMDM3bqyPzSloHxjLz9pkw3nTFN33pHuNJVjH1QIt1Mg4ShuQzFMod6OUCgkf8y0tg2N1vDwcnKRcQuN4inMRiVA8Thjl.IqMflK4nYlHbTU8BMTLXyeREXuYo792bnME.RZsfnTHTYGELS6HwrTfZUnuyUWLni9xcOHfuBi6BhIWOqKxNiC.9l.JqWg4I7hk9cyVryN_3IUfgd9GUwtiBeGVpuqOpPdMPX3MYOev.I.s51wmmRxHvxkzseODTfI_fygwJtSmKUBPDVX5jNZhC0d54SMLyOGvGUUYMQ3Bzw977KKFPl6GppBgvgs2HVmY2x2jctsv4.dP42w0b5rWVczArcs2BeIi4tba79bLM0qM_cRbLJ71Kuu7FCDjrFiAjOp0fiChjLK_rUOCf0hSUQZb5pPqotR4bzxTHLi.894KAXPfLX8GehkP_ZDX6xXNoAchunYv3O5Gi86xR1NB2CNHGCTgCHZ7S4G_WVJae9g7qS8.HVmLNmrSYk8y7YEe8qVsZOiWSbJkoZhM6LwnQoJHr0QgNse1YP85Q23pwrVcAKOiLrm_ea_ohL95XNeXSoKlcm.64K_RfcDF7GYAwKolbvNH8uUq__sDEajJhW2QJAmucnriinIsWHp_fKJt615EOzT9N28FxUwFuHJHz9Z7BVOjJbvR_G0HrrpYOAbHZZiKOu1LAY1.wDq4uZNU90FCHynuydS3x9XEgZLcrq96ydHQ8RTC.xxEmFad3FolhJT_5huunUVpkui.o3SBUGU6689TzheCQzPK0n8HTupuZGQvrijyWANzm0rOyjhGiwD5K7qK3VOvnrr.Od0IIKWvjZHBxK2DeHfND8Ux4U8g3UVa6VakN5EvAcqfDoTAFIx4bSEBQjCSLIUvOeJAY5BWlr_zWLPhqA.RKFbmMyxwzV_gtcbUdJjpioptA9kzPJTwgoiLlz1L2ZwDRC9lLKsTet.qH3cIzI01NlcF76HCZMwe9gOvLcfgVlSpU9YcgYzRVWcKX30b0DsS2b_HBq6UDCox4fCWij_jtr8GA_HE9rVDXHM4BNwgAFsd7O1sAcNuyCJ.J3qO4OUZblCw410zaD4RUMXGudpZeoV8e55G1lyX1KcQ6H0HegRsU69vcgKLIFbs0vjrHQmARcys0ia1B6OowhZ4OuhvFAPYChb14ffVDszn1HUHC8LlFfI8aM8b_Iw1PC65nAkt2o71cIGaeQgH4kMUxGJSWa7HRAsYqIynr5.cj5BIgTgYsOUXIAc8vK7aN8uSafXXtqtqNuEhTL_F3Bi4Sz4xfZ0iJ7RnRRxBBmTFaF10sTjcHeMbE3sidBrzZ6BMJ_iz8_8FZ9gwP_CkDjxMkPDCxF_dngEsDoDQP6rmmensYbMy.d8S9xcxMZ1vWQR9POzw9VfS0RlcfnBppkkpb_eamhIKxfLEaXZI9mwVqWCog5ITKDhNiO070IRQJYSWyBCSrQX8Jk2jN7eINXcCWPLxqtVTB8n.6YXAuGk6kr0SRYq0DhK7Ww69zdXTdiHsXMQL.iZG7iY0hOCxksDpZ9nzfBJPhtW2z4i9RytzFajch671hS9rXeXZPcb29f2.UPpfh84csNsPGhD7FynBXYeQ_8EygOfaqLNC0fg4IQZdCFM8zotoUe1PTeBj8P5Sno9yuoflS0QQFl7F7xk.nYyEB.5V.gEdmq_X.f847jzDJEHxVzBAzF2kb4OdII1Rl4MXbhm2Rycwr0xbTI60I75x75pZmSPZQbgVhCjNwCw4e50rWvZ4RgtwtvSlRGfJi9bPJjSrYBSyj6nAMSa6VFBxjcMaOWddGBwNS0yFEfAj6LI4GB43MmJW9vkmnZM9CWQc3E_5GmEqSfuhuL5g8ddavFA5iNg43F61PxqyEhLcJmOYtL2Y.JHkVv9j_IYJ8rcKJvM56L4IEKxGKZY6TFSUcn6HRFmAwlOEr9J7soYzbaWM63pXXegzwHSjEmr5o7dg8HADxOgwmG4NcNM0g8GxlI2cBtGSAhw5SA5Zhys0piUO8_6wRuyhee2OOEmtHUTRR5h2GaKJNHigdGJF.ZTjOjY8dhqX9mpSwN4_xmQuIeNJ2Lj1hwypHTaeygW58sMrdJ2vts6lIQAF9FzA01PBrQ3Fq0SIneE6O.ZI66tNd_avuh6IJYAwx7jfbUxLJTgVgz7fJit6y9ZcGlekZiMTAmlHWOw",mdrd: "ziycIno76ZlIcP616TXv834veX0FFPk_xBCfEI17tls-1739227782-1.2.1.1-u5nQRLKhsAVMHCWbbQRX1FlWUc5lnugwte8_quDGjuSUJNp5u4d17q0rA1eNMPT4VqyT2UnOV5guYOQDHlYt_Np8j9F214nvU14QMpZP8X.5PCzYJozuNb0BM4k__6PyJ6tiAIcM8M4S6pX13JxYIRoF1RXh0d5Tk25AazQlRyByruGvA6_FVQqqRkZYZBBhQfEGXIILbJdqs7I0K7g4r8e7mwQUnLboJTGezRPx.1oC02saeniPm.gdpyJFaTtNSDpQQUJGjSJ6IE_f3ZUuDxxK8xkw73U_qOcYX_.GXPgoRhmfONXH52gKXNbAubhj99uMyq.xI4iQ0TtA3EmKJx.XEeH2gUL2lWQ4SlA1OrLGeAU2pVcB6MQCBbsbWD8HWQK_LPKcOeHDXl70ySol8cw9yvxKdKiPuu_4vzJgth3U5RN5AqeVUsNoSPhiVq9VX2Fwj8_ezcL6B_eXvUl8uDdyDCkQPsROZct1dD3Kj8H1Ni1uvy.eoytnkubNH.TGItmEw3.KjKjCmgvXCIQ9XfZsOYLFO_hnKXiYLFQpLELOkaIokIxFJGHiWtLH3IV526lKgkZBqE37mq5CIX2ESb0pVVwlKdYIGDYw00wBT5IqqfLI48dJmx0P28.Fl0nlV2CMysAkbY0o0hmWgiqeNCYjXtVMvsSFcVNVTQT9Dc4uKhgc35IUMOYZG_LwRHS6ksSHlTPn_JdzTerHIcIOB0ZfoMCH8MSRXvoStojTPyuby2t9rdb9E62ZkBKxIj2iM32oVooD9EDrvp669UdaSfvsa3Wh.5if1psFXPhBz6sQAYn3SPlzYF3prpl6ZcS4EEXcFKfDJyAKcXw1xTWYJ3okhOTJopdGk06cQMaaZOiXlZkROACYUhvXbApw80YcmDXYr2sCHQDhO1xLZvCVFWVDOx9gKBJ5eA0uuGwJP.fhW6NOf86y80J7pNoMc3l5c6R.DZrjXkUwGKV.h2AbU4i3cp2.5e4CU5F5O0Ue5N_3KvXjY1lVAokITpTYXRRJM5T5_gz31rank6P7CqWSkgFrN82eJivxiIdCccOTJs_Zi9WhAU_Z3ed95_zssJn9HHEvYMSLmYQAPpLTbsuO7ycnJhmn19OtNmZc9Is7zoOqu71Qq6XqJWGBJnRgL2DcJ2lTpGEN5lFXLXZG0wPAi.gcm7VXbpt637iGOk3OgfER_49iivzHwZH.eYY4t3bsrlO5_hZnRmfEJlOIKkeIj7MyVHE0e94FkSoeSZAtUU8ZPxArX1r_jAd9_YplLaPUR9qdrAWLgD7uEzCjxSq8UVJiTDbZPgVTZVTCyWB85fIQNK4JfwnoKLtVwnb9bqvWCAElN7FuDi9kXlvcFcdIabDgP_YiE8_ShX2krJVO17Jx3fuNOe9d.L7xj57gExEKeLhTSxbFjBj06FsrrrM1bpviakSsWP.4MWNXYup7dF0uHxDmaj3OxrRgf9Lzv4YBLthnlrJ99Wim.BqYvboq1vNRAHORt_CyBI6fOvOVLV2YxotX7Rwy0GdAPJP8e2oh4Bl7XpOOFgOwFp5JOG2aydiqw2oID0LluL2LfiDED326iwrGJpSWmHT44k2RfzrfnZUclsl3pEmc3oK_18hRZcHMDYNSjYW56QWoeolWDrQ0dHNtQnjFcF4sZB4hDy0yBCMAH3d5.jqgo8iTO_Q7QZUCufatFViWGz2I66hkILdx9tGNyxLNfx5_uPfKT2J7PPCs.ZmcP3Ndgggi7aRst4BTdUBnpbWNieUDHVeRwfE4wSt1ZraDfX3l4bRBlUZSSxcEsZ5VrwvaoyBmemW3q21KVgJWBcMHr6PDEUKhDmoVzNeEcvao5qO4cIg3X6phLp..nZ5fYbg9UC0buPd2WQ"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90ffa767dd025b10';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\/791624927890?__cf_chl_rt_tk=Qr_kOagzUmtSYS.k1dOffGOmCW90YlX6o942Oi.D73g-1739227782-1.0.1.1-bRfwhg20hwtWRg82u.VO.P39_fmJhS048ocUBYsSPI8" + 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