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-9627518340-gov.caltech-edu.pp.ua/post/9627518340

  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-9627518340-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fd3ab65d5dd6d0',cH: 'mPdLE5Okz9aZ_i3_lZaMNgMP2W_yOrJcFPDZONZA1R8-1739202358-1.2.1.1-e8FLqQrx_UP7UgxVP_m32lrWvF7xMoMTO5WLqlrlGJ3MKscFwur2NoOEkS8F_N_i',cUPMDTk: "\/post\/9627518340?__cf_chl_tk=nEv4gfjZrUZXndk.iLMFRWDa6FKkG00aw4o2Kot2J7A-1739202358-1.0.1.1-SdLtk4MGsThnrWb7DvHM6GnUBl5oNhwUKI0hXuEvrvs",cFPWv: 'g',cITimeS: '1739202358',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/9627518340?__cf_chl_f_tk=nEv4gfjZrUZXndk.iLMFRWDa6FKkG00aw4o2Kot2J7A-1739202358-1.0.1.1-SdLtk4MGsThnrWb7DvHM6GnUBl5oNhwUKI0hXuEvrvs",md: "FiWexEouRyqjsaEg7yRhYawTUbz7k49hYXohgnYc530-1739202358-1.2.1.1-I6ix7tUMoZCBk9QccUBbOA0FefMAYufpJlS5iRKpun2OfLtLYKyCDWpaDZGs.cPwaoba7sPCY3RCRNLFv1l03p_ru8gDmN0SfhV2w34SuhIzz1HsKiXV.3A4wCTGldv3E9ISp1s_pW3WTf_J1CJvj97W3uWr0zbTEZYsZSDYSjcyUqx2zDPNqKetXKZwttNXC3wXds_jjliWElDuokm6lms3GuIoY53BmxlN7gIroPGCR.ot1b4lvw3knRsec9Kcbx.Uql6ICFOJIJbhl7m.3FSH3veHMGoRj8i7B_JqBAHWmmVxTQldFC3Aqm6vMXdjYVch465h9e84L5BTcPD2Ju44SsJbRJxBR39G3TjJWTKfwxwmkJEM0Pj.6LQGHMkHl8ID1PJvPNOV4TTi9XUm8TMebdug4RRY1Kc.gMe0UGqEbHeCJ4d0V1QIzMrYXz5_CM8CDhIimbqR8gf.N2z8C9tI7juBtrQ_xHJ_KyTeqkhLe6h2lkW1nxSizZAFWK6QGwRLbsT.mwJw6hacllcRBtFRICXW1Rct54eT1p8JmWjT39LVEFcD7oUNmPfdt1.o2._vOLZZY046d83cr35Bf1GSQ8KW9k8zplWFJnyuhv6NXM1ElN75Ot5DLYB2XWO.Ah06RI2ZMm6F0KIS6iUZQrpCEGNXatV0yK3LoyDzLjk1IM3WFocvzGoELPjh2LciBRLHN6MzIVvscSugGTG0d7.pQjmL0j1my5F6aiDL2qv6w1iiB1YiIqinmX8098Ig4JOAmW4xGXr1s_dGvrrI6_4Bgd95pDFEOu4ZQyYAEje.coYvbln3jkgVP2JdXQ.XB0_KycrnyMrDts7tQmmW5CdBs6ChJQUYmSu1qaOt66VGk_ND6Ty1NkOz8pr8VUntBIKmcgtOI_f5U1Xuj_I014VM1NtmFkwFXHYXalAi7tCMRVaToTvuQAdiueoVDfmALHaSFj9TcR0cHG3pN7D73DXJm59Mr3enxiOzKzdmbVETHG6hvc0in4msBtR147s9V0CQWTN5fBaxVRDV.LWlS9M__ZtDsQ2nhe6NE.vfA.KSL_TmVrzwG9JSveI07Ob.5tvOVcbDj.SkOGWBItjDnBT3SMJyOqQaxzZhqxk7HZEv23ZPzfCT2m4rhVJr6uqPIDag_e9pr8lGfkqCi6sCg6rLqb7AFeD32pdisUmB8a0zY3rMQj8LDls9sA3ypHstc8nPF0GAgSZ9ypVTBJ2RbnOUcVc168eLnmgiKvwN2o37Na68ouQhLSmzgbedBb.2YlSNTLqAY56i.uUwa2bYR6z4PmvynN1G1ed5Vu2n4bmhIsgQqjlQs5K2U11.VjTck_GaGYUm3TNiFl1qMRvcclc5_or8dHmtZyecbOFNQ8a90QAmH1xPAUHBdBrB7V8Wn3IT5TDRPrUHf0S7nKlwDFeoTdW.5nDCweFl.Jq3Yu4LoD5_IVDYkO24PSNDfYrsQXe7mjhuKsXONt0_AR7azeqNpEO8k0B2LIhq7KO91kuVpj2hNYjlUlZE2GU4ql77Qc._qNbttoGBgEuho8QL1AeDdgzuuCALPxGNNGd48f4ET0.AweBzyPH.FWMZhDtPel18Xqms_qnQfzlqTQ34aWCIHekyVx111WsgHcAZfSxqoKjH8DpV6S0xkutOy1pKkeF4TCXrbBiZ.030pkJuhIAbGtJGknST69x4d1qhBchznof78A3uzb_LW1ONszxFTIP_Yz3Pe18asj56WLfiKdzioeaCj.2eSCw2se_tIDSU4SYkzErpkvEDpCOmfG7zKTo60OKefOLaOqesXuRgSxcszsahLWykmXx7YVMQFPLLEMMqPSN9Jgqa_BnpFedKxlSk3CCuh8ABLwgwXbxJYchzCz.K3afANJCwsRvtr.Ts92odMC8Hs_tk2I1VFoPYKE6sQ2WbXLYqp.43D4yIUGKWXJUfAC0l4v.Wfy5B2vBwTcY0QFMnTegVFixuP5RQ.IX9IY_LJcD_Co9PGbYDNwUtreJzt65h5mGinFxylsxI4_ARi.r1X_FLdvKKbnICYtc07A4XOS2b2NEh2DcJDv2Xfg51rGnN26MuiGjEtQ9T00pXQLnVJ1W1Z3JlR_OmObNN2BIMXDsJJzn5kEW.G.TZmepfM6mJuPQ47sCPeGePRWFX7qUJYPxviv1Ca5y3XxucMrQZ7KELxDqhmVDfDoIX7MOdNXkykGrj3mUHE8epEssla1gTlOzXxq9XOr5M_9I7p26p4qYLP8MsYbXkdw",mdrd: "RARjqHKt3Wu8TRGDdQTQuQgQQPSlNJLBAbawEtoKXDg-1739202358-1.2.1.1-lkYk5R1xbvGlcwQmOS8Rhu5i_0Zkt9116HHZjteV2MlOVjbMVxArmVYYunDkZsi4oNysdtqLLHWA0z0s6HJZRGlzOgJr7C3QW128mv5rDRoEqC4ZiyY6qEvaPuRQzvaAQKZoJkKOu5R1AinkTd36xjK39EFHaMtx0u0phbTV_.RyVe161pBunlpxKIQrBlsKkppjf59u7Y5V5iNx2amLcradYeoPECo_LJ_lN5K1l1IyBWYySEvspcmW67i1aScugEmnpXA7r3jjzxGS8_ErcGmeWo1r459Q1KLfrIy8AbdM3ZltaChS7yZZ1eBD5tC3c1f3BEIoX2atr1NuUWTx4ZL2xnH_A_c1B.ZnBdAGo4Iq_GejEkRND.75c8GHwFbD6MnQMM0ZK.ZWzz.ozTP52ETxfYt5nr05XPDBeESrUutNG70eYpO1TqLRPViooI6DfalVmwumEU232umNEIibye.g.oEjCSNRA_a9lx7G1Qnv7lPlpSz74esCC_JNX17V1e.F07k_pjuv7y2qHsbKDPMTzUnUHMBZqi8ltGyxpOo4TMtOt76E8F7B0YTbVnaHn4mUiyLFhBvSFOZUU0UPRS.Znaql69cr68b1AF7wXIYSzrbgog9TvIQzSQhicCGWoAkbBZuDG3ULfSFFvj38qQ0cMxRAb49MLUiTE9Ol2djRaqVh.sEXyzy68JftCZWnt5itUOjJxKdthsF8PwkWsqDn8QeEhiBUgKSahgXXqUrTlnGr6vfdilfxFml4NCd.gPr28IUh_fZfwNetqNwKZDWwH3zgY16T2O7MgjeC8T8fBgqW3oXl1UdAj899NfjpIUwo4PWeoVibhi6YYIv_dg7SOF31As4PbpDrQ7Fp.XY23z_dlhijGDN2l8inlcAVUfbH1K5_xXwMRpPYNljK_7BWjtPpzgSihVWFGOf_QMPVdm1W7Ln0NmIAhTFko0BZHDGKdiPAernp5vUnvgYPjBWfhi4TlcOc_rCn8coRB.W60zTTnNknlM46JImmA8zP3Xml8nYRriJXfbMFc.5pglE1gTVKX0DyS61rwEDEhGStiA0jSERzcsWqDxymTE6DjBVzyjJKS1_p7pzopEWwsi6wbUUWabb0qdNRX2HP5gT4DZmO.PrqJVXiRvWi0F5bQO1DXN_ed1bFMsI4sA4lgOKblOungTHkT5mGAxt7fK5ipXLeSqoX6u6HcNIMExfKJ_YUcZvLrGizSAbzJ2dZEYX0Z7fPrjcxqXa9kKSucEBRRZDwahiQVMdJ73h5Ehy_crPgoZXC19fioodgPuAgJZQ2puiLmWx6BYOmxTfv4lRNfGmoBTI7loAaJf0j1qsTPdJbhyBJ4aFp2IlVHQ8KuMpvAtyc4poDRdbCkEW25LDY8Z8BVGNt6bkQ7NLhHpKwCdjQd9t6xWrYzpiGMoZlEd9ln61ofX2srD2GvzoxlJ3QgmlQWpZ_oKzsef5ivCRk_Pw_QGZF5sNUBxCZJLvje65nOTAh5qWKDUU_YNjCc5nc1GGiyCeyMCgB.TiIVG6st97pFnFMoJrqbLTUdSuhRMz1In.FwV35a_9hnqSilPpaqaGa2dbmjwKonXrn6bmpM106GiwmZMM4ZUjtEiv7bmuKSpjfJqlnocQh9jRYmfLnavona9cVwdkXiCGnYldrncdV6uprN5pFpJdJXgHbBuooxHd.Jfo73.bWjJ7ZvdSnKtrDzRZAufzTv0VIION3BxXQ9MAMVhqf.0QmCIXeMv5p2edB8TayyoDOvjZoV6l5TKFIstlDzGmDw3J.sxm2FJc73muKJzbX_mNgtFIoY3yrS5L0FLfaYJJPsLgAXAw"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fd3ab65d5dd6d0';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\/9627518340?__cf_chl_rt_tk=nEv4gfjZrUZXndk.iLMFRWDa6FKkG00aw4o2Kot2J7A-1739202358-1.0.1.1-SdLtk4MGsThnrWb7DvHM6GnUBl5oNhwUKI0hXuEvrvs" + 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