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-0853216974-gov.caltech-edu.pp.ua/post/435090660005

  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-0853216974-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd48389b9320a6',cH: 'Q_JSfS8T8md_Vit0zNAWaZ38M.0aBik8lFHBC0pOeDA-1739202912-1.2.1.1-S3Fiq6IuzSbvu_P.bF1FFeLsks_HTKqOQQwuz2HumRN.r4ZbUshDheC_qUB_9SFY',cUPMDTk: "\/post\/435090660005?__cf_chl_tk=qvyvl95tC3Slua5ynMGpWH1uuyuYEQMUFgddKY44r5Q-1739202912-1.0.1.1-OSg2_Gen5c2DpgC06d93PFfWhZFazs5qEBIemB45J3Q",cFPWv: 'g',cITimeS: '1739202912',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/435090660005?__cf_chl_f_tk=qvyvl95tC3Slua5ynMGpWH1uuyuYEQMUFgddKY44r5Q-1739202912-1.0.1.1-OSg2_Gen5c2DpgC06d93PFfWhZFazs5qEBIemB45J3Q",md: "P9O7QGVKuy1mK6KWpHGNboin.AOs7wJHQQzbIEryXCA-1739202912-1.2.1.1-z0IzO5e9VyzbdaB5etcTshQ77zGuHB3afi_vhIV.RXSU2hrCTmbY9SfbZTeSU8VpIp0J2HsKIM7c98WQRrM5C4P9hLgQa.JiIcc.VW_qhyRZyuSaWqs7HJN6ckV7R6Cs_TucQ6u.Q7jTHsWNOexJ6h7tGDNi5XAb.DDXGXUE6qEO7BU0S1DZnqBBRq9cFXZsUUT7Y2bGlUAKHcqIRYLjoFw1Y6o0glPmp5zRtYIASKfrE_Uq3qqpixWKBegKytE_nbb7GMWVTesqeShfxm.DIUXh_CxAlnviwGZ13.zsF1TgqQDAL4Blp0w_gzmrgZmYg_ncZ967LcP7XXQMRnmRI7klpdSmuJRxCtRcV1_50L3oMI.LmiZS7YkU6BTbJHeAmzTeRZe6jX9ie.n1B7H2Xgzetj_QW3O4xilX0FQHrm6dr_ijWTJTG8eTZ67crCBaJRstfFwX__fQIREM7JWfT8YFcToeEVOvHbZZQatYQe3R_5bXLR5EAgiX8Q3KLSrvgVVnwrc5fG2a6H.Vcp_FMLX4VbeGfq39VigaE07WZXWr0C6rqYD4VUXXmddSCB115DlubixugXwMbpfNaGHzDDQZMnKEycAPkt6I3PzSuJ1VLokVxeDKDVFfBL8kO8QZjlj6nNkUvsSlkpdeKWhnxdgXqeMt8h3cNFYe2LZ.SBuLwBwF97_zhU.H_nSprj2STaU27VvNpYJJxcfgn6ReXYGskcxM3gKjfIGTT8mgh1blgmZFYNFWDYidPJtQ9lqKtAuFWLYZmOf2OXYakmttKnHC7D3DK5iRUKuzHXqoitqhDM0wkRrNHqZN1AGtBkc98pvtwbC7ulqh6WtJgkvvpFYR58Qo3RwySomlXzBEyzCQasui..7BC6xRTzaTTVbnTK5QTRA1L9aqbEwjwICZIMWKQ0jjYEe_9T.dW.eJi3J2kd0XNYhnu4oBMYloM5Ltidpe7zGABPgSKBe6yFE3gfeoHe4_k5slheepjh3xCfgvJY_N70tCbonyuAOpKPB1e1GUvVvGrO772B00eXbAY.xlyxe5ypPdS9EUXgndac_vW7BRWkE1s67_olW9TYZTdyhTskoGzd24iL9T43woH1.RuXCsAybeoMs.9r6VbPM1OdN0NhLmZdrOOu7IOL1gG3WfKy7kejglhS3Linyh0.gv14TNUs.Z0GSQlPjBbmIn73q.Fup0LOOX2VUjENLY1ulY35D.nF6mGeaNXTnkFVZI_pW3DPcqSj8_nS9idL8PtocAAa8CzYbcNbPB6C9hyaralEPFSwnD7H3vhpC86UJe8mOatfwA.xG5m.1zr6cpJFLSl9dV2SeIDVXTvl0BUh5Oow5kj0C6HWyZKJJ3xIIKUzRer_3ap9BdLq1Zi.RhNFdCv921ZDTPeL_ImjGNvkTBUaMcvBTVxU5MHpQBrnfnLPzNxBJvyJt23MnaXL4GTemVNriAKABp_dJKG0G6ucf4CQWLKHuFlCcYLCnb8pftrDVPpSMePGTPasl.aHS49AAGkC07M_kolpz5gUfTrfkNXmn6stOFbtlZIusAbYQRREvZzWKY2btwzmwiCYhuooIrXxSwCjtqxKfm6m2.ApQLrVhSWVyPdXW3MMQtlKCd8A.pRLbyIpYHvzpHMEkW8BmKFOZwsaSOAqMQNxqcyEmUkFKDgeEzW.XrYCXLMMPbF63RnvtkeFlTar2TUkFjenLDWuo1XJv2VRuQJw9yaC4PgnMrwFa_EfMVv9kmcSSPTcxMCEIAx_HKTtQxDJt0Rx3PZ0K_kD5PTw0AHTfD.qFl6Y4a2riJHnMaNfVBKNG6hiSbQ.lX3.0i1bKdvmIlZgeNa9GlolLXT.AaPEnz2t1bUyUi3ho8yMQISDjOe9EKlECmDh5ZO6h1LL2EP4jHW1J.CJ.9NHHG5hVCceuecqDRirUsDcJ0pvce5HcqJ8dnRDQXIYWRODGkCmUhBgSj12YhvWmGk.jSo6ZpMyF84RIKZ2AR3Ois9VYQljA1VgP7fd8KNEtIz6riiC_lK647i0GLnbkcwPgjqHAm9Nl29ZCpkz4LTryuCqXxGNoZLNYqYplcGP1lQJqLHtyaQRFa_VKarNPHTfN.CvZH3gzxAgotqe1kD02ESJsa0JoX2.N9OtwVMTgJ30Ajy4BGStGTBUxfr5.5aU8_k7demzj20BN8UVDW_G0zWoSTxG6usBDLtRD9Y.27aikQgwhtXlqYeHCGV11jrfvi.1M5iTQR4stBvuQ4bOC47HkMkGdKgw",mdrd: "WUTWIbwB0ubKaFarlCWJhnX77Yu6TEA_o6Vn7T4PM1o-1739202912-1.2.1.1-_bZ4fvNdjmY9edm8PrdD6zE6ahuumMeEN5zWBPQm3IE9cFhHAXXNjJDudNW9x2wCkg5kuU.I.8QepOX2kpEW6acJN2gA8p2SZbmyIGlNkoRtNuqdye.KVzDg4MJyRvyeQ.w8VIi5wnDmuKtcABYIcV_NiD3I6zlvCJO2pDKUlT_6Wq7xLMO7JPU3pPket4Y9lPSNnYBvV5eR_KM87a7T_ZUygW5NlFgax5pkoi5k6Kr7Nl.6dCkUp4X3gJiHta0HzuvR18gWYXVj4oXKUqz6i3IARrQ4F7aBCQSIhi7K39kgzMTjeCN0Z2s7NxS0EO3L3aCBFfckaQpzs1ntKtjB9ZsB0xjiocL9xCr7Y9_G9ZpWC.CCGSAdllT_Ow_eX3RbIGSLXzf83hJTmhDCB6n68hgtVFkeLQiOnX.lOg_x8czi.2Hp52W8JyZk0SPSM_jxdVVqpfbqJbC0I_FwB0Nh934xdMb6uP2f2cVjx2odBc3q.0Ge2mRNTwzZ54jgAtZTuBvDH98WJBbJvIsr1nr.WzL_NgT8SzNrqtR.MGA3vft7ukDQdV1rwvAyGf65t8NXgP6r_16eh0DgJXMeCwfXtLFm7zcF8LdbJop39C5iOnbJmS4KNaxXw_svqzZuxLxTJjsjRzDzSIZAt3R4ogZbTLLZCduOeG3pjS4iaWncwg6HAsj0ZsQUzA5mh5xbI8PR1htMSxFb3tXc9fPSFueBpKnqWt2OsmpRuG.1YdNgPGU82TCIEiXL_nQ1haQPrxJg403KwoyaV2MjLrPAED723N75ZRL4zaMYd4TH1HZFIkMWRS48f3Hey1_PxoecKhF1fqglfWW.8CNVqFYqqLcrvYzz4mG4wIVrQ1lGe03H6QHhwmUrwA3M7xUVChdm5zgUBGKVqAY6_wmyLrfWdEjspxyz9I7yv9MBIW_EvPc1UtH_t4SS524eAeTxbLU4Z8sPR9zffxp43ynT8O4cUgU.1lkEAgd4BC9XqbtqWiFotv2TvnvINKTzmscFqQCC7hOCXaxloSENPerKLCsw1Di3SwENHGpKBx7wdYhnJdCB77cQ_BfY2HqWw3I3l4R6Mgx5LmCg_gGKRFyC5odRkBgylI6K5bBD6KSadooW8vbNhgXQok278lsfgWK5ahkt1BTiRP2qlqbE1ZyqQp8_9kvtAlXRx86nf9CkNWsFOUsX1ytFUgQ6xkdqNjwRsH4lk8IzWAahhnmcyuKwjaqlD_5_2slj7SD6iXE2W3L_GS1zLzc_xpddoFNuIeTcAM6NIZfmVqKP6YkbZDuJF5wO74iFZ6UJ20ujssIIDevrlpNsQUOJ54cRG1U.8HrpGY_ENwMvhtWZ2xPm_LrDJxgz_Zn58UKeRzBY_q120MDvbJPAieAOgCiU8.lAGeDej0KrLJmTZ3bEKFLBvqNhvexwe0G8z_K49eCPsX5F1NvR0zypIjPihYlO8N7VY6PMlOqES2ZqVPmuiSFX_GiPQynTKU288cV51_shl35oYsUPbdUqQqxLRx3zrDwMn_EFEtqM.jF2yqzyRZRMCLyBmvphbQVrP_dutB66IQB9tRg_da0PGzmkonHZ3AT0AZ4B69Bez3HvUKHb9286POVell8lehyQdXXqCOtj6M_eOorZcl7eVdzfejssjdtLRiATZ.5hDfhaWmSxtLJLjWw.LRzfcDNZYArkicXWkj_SqVDEyACTAYrkUAXMmdGDS89sPAZWPBAqKy5JJKIOlz.ia815npwCxdeqcu5flRc6cq2jdsJWOdeCRbAMGIgfLzlqBgTUsL58kOkFtjcJN6pqxyFzEalkcE7CDi.VXsb_5FdJ3eT49LgsbCjZuuZSieCpRMizo_tE"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd48389b9320a6';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\/435090660005?__cf_chl_rt_tk=qvyvl95tC3Slua5ynMGpWH1uuyuYEQMUFgddKY44r5Q-1739202912-1.0.1.1-OSg2_Gen5c2DpgC06d93PFfWhZFazs5qEBIemB45J3Q" + 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