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-9526138407-gov.caltech-edu.pp.ua/post/7428306951

  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-9526138407-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100f7afea25d46e',cH: 'M6tz8ODbCE_mAH9m9L23L9jdddqbCiOD9HvpreaLSz8-1739241556-1.2.1.1-fAx1X5.XLFs7SrVTY5CFKGklC5Z1Gk92fPunk3xv1hLzvKwGTMu_6nahTD3UfjPe',cUPMDTk: "\/post\/7428306951?__cf_chl_tk=sXD5JiyiiGSe8WTuhDKEIDDGDibWAT.lWfuioHp.p.o-1739241556-1.0.1.1-F4yErR7cIIyA_fcOC8rAy_TJ9RIJMSzSb9a3m9bf1Wc",cFPWv: 'g',cITimeS: '1739241556',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/7428306951?__cf_chl_f_tk=sXD5JiyiiGSe8WTuhDKEIDDGDibWAT.lWfuioHp.p.o-1739241556-1.0.1.1-F4yErR7cIIyA_fcOC8rAy_TJ9RIJMSzSb9a3m9bf1Wc",md: "rR5pUiCmAR.lrO.Uvw9PyY8tVoivnwPLthb6EJ3u3NU-1739241556-1.2.1.1-wwawZRA2SCg6nW6.eHtzCs.STsO5FTFcpuYyVuqAtYuJV_8kROt7cAYgtThR1tqBX7xIF0PJIY60MhUKC9hIXNgU4d75ijahquUJI1KM6mgfs14kuC7qd5yZrWiPekXFlpswTuWyL8_Ci.QvpWCsMcSkw7Vt3_xYFZRyAoNAIfc0NoGH7iRwXMdf96hRnQu2LNQ.v61j2qJJmH9bvAkpvS8uyxt1_X14obChl70_n3Y9g46LuQSFSftcqPL4My2JOTmhH8wZgpY7AwBUiu3gu4APag.ZyK5zGhH_oL1uxArjgFXlckoxU.ys1JxMGt6kRibi6muXJ4a5ziH2wcnS7gFuTzpERaQzewbzX7DTPom53GsMTNlFyhAoDcwo.F9fgaZa6HO.cNkZ3GYzODn.prQSbDW5qfA2uyWvXttPGMr7ktatHi0UlnkLgav.wTES0vsfbPpW1vSFOvxNlMIdXh65WJ5bC9wlXfLyCuRZmrwQzN3QInelnDihV7DJG01gzpiY89vTVDtfoNI15FOSGMsgexTdo_tEvb.xpsidRIIgRZtxFB7tYt47FrqeO1GLkOwA1egf3De7NU0G0ypMTZTWM2TpqI0L69Un4wmkU6pE.I0jDXgYejpc25sZLEr7dkv.H0izix3.m.ow5ksEdI8SezzHlQtxvaM3mzsDF6nyrDLNU7x38DBvJCIfAUe_MyLauskMf.OokqZI5eMfVbvitcR01dBMRMTXA.ZOgW2EMe4KJaPg8u.s5hKfu6JyRTUVHGY_cmWZuJabt8Q2hnxeGaFAkn7VC5FXiq0_F4BPIHLI_o_hlBOn9hzNRSHYslT7U09tiUwITds5vp_OVVrMk8_ijUQdjkjHhIBA4lseT5OKgUcs4zZSvKcZLWRNLPHtn9OBx.11VpKde5NXoyyfF9xyJ5K0JDgIDtVpksRRMTc2_pAT4.CT9F_sjsDsrNrTi1c2P75le8V3fAlYB7cbVnmb2cmq_9sfYN3JQhs.8sqVSOsL4PjvFxqA71SnM4T4cC8u5HiwDCm6Jf6d5d0FVWzCBtRGoOKuUwDBuumT.XpvDzLG2Bx422KbS6dLXjTLAQYX.uN0r3MwjaXuIwxH593NILfN_JY7mORU3scl7XJNiGBs_iV31RTlYQpkInrvT82lFAr8.KFvO7BUR9aei1STOk4jWNKEwyvsEhAfv0iIStG.er_g9BWurFnJamOzDmit7ttNRWSEOOjP7XXh0xMhIUyTzx73LxRHoxE9T3F2h0okuqSw9UNPXdEWA.zk_l3E8cvX3jahtlukRoBnK7nvTQQyIfeHdeGxb66LkuMVaQ8_2dpAiDGYQ8UU9zYKMVSpVhhKYrL4ACvC5QyxrP1uoJ3RUaq_4DLL7bXfiZlKgTY1xEQKYrFm4Cw_YHqnNMX7ZVda1uXIUC7wsFvbiQxwuK9UH7o0GZF7n05HPoq1TUb9EAxjJnqycKJgrDepHJB5QyWG1k.nbPBd.NCG0ScVrmq8d5rEJDVjOPhJ3KpC4c0FutcEANWhufjzdGJNvD7MdhSvf93.4IUUcjy_XiQfvOSUVrpAblFBFbz8zgbuKyFsbfRGaapyGSR6RQ9MFnZfAzd5piU6sP8gkY34i.eiDcMT.emJ5TuoEdPZUrbKrCM1ItBs14BhT7j_AJYQ4U7cylsnhU5AT2HF7Hu_Evq4oHXTczXFjZvYcTXkurCqlvtc8Efqtmjv.CTZaBVCBswNCTzMXB_wp67i_AC8wwaT_XvsWWTCGFNI3GP8oTB8jYc1F2BuhrAmUA94P84d7j2OsOKHHCgwy.37kdY.A14NOSFxS2yBTHv99i08u9GsgNHnbQ_Zh81hCJWjUhiECWjORNj2DLvZoHKXByMxDBlTuEirsI6bFVAC_Fq7kBnDuRSszEgBZox.1LCY2TJbEmNLamEV383A9.95z7WNp43CECG5A6Tih2P5YGynSF20WcU5G2sXSxCbGHBav72wjybJEyW5O_9.J_RsUmynfFjnKd4SubSy51VKAvynh8LRzvxA37XwMNoMdhB2VWB_QF_3v4gElloW4NTmI51nealTgxj4Z78zBw_VeAnl6Qaxzj704acLrh6XbczOlMQG0P8M8GNwegFIMUrQaEpJ6BXoVK5nDjU.kIUaGMgZ7GgBjF2S.Ovop7tf6olkZIBoRKC11cEWBkRBmIQaB2OsmMo3eu5Gqw.1zFvhwhKBaLN7g7DSqwNU99Gke0B7BTDDnOgLTTtMYvggRI.gqw",mdrd: "O_C1rDpU1mFN.tAbzco0jwI0LGBHMK4srq05nZks5Ns-1739241556-1.2.1.1-MMnGgWZeMdCuenpEdydJUbow.qJsmUqAiEs.iU9Aoj0YzZH.06hsFhScLNZYmPK.3sty8Y0g8HWUoIuy.6gKP74u_GLC4FiGqFLqkTEwufFE0w2MXmJo_llKUXFPHQ4T8m1Vtyb28vcfXQuGZ6C_aBtJUKpezcSa6coxwXDyGboyDx8MrLteUOyoQT.2vwkweVNEUV5EkEdhz3aFuSDamhJMQMhieW1bLkRYcBK2FZSBhxbmRwTtsLxT2AYB08QcN5MmTwYsnGkvLUNbTdIvCqmfo7N27tOKCPrud_fSqC4A71B7M_ffHJmKsnG4hWJxox86vcZyrx.DSL5RDO7v8aSGEwGssnxQD5g4FY8nWayw_rONAG5Lj4jg6MgsgxxabCMeByEJJKtmLxSHe74fDDxrdi9KS.4hkJ6y4jEmcS_pX6.4J8DSDBqH8FNij9St3pz5cCQJArpUOxj3ZW.vq35KGLlRYfA_QjjB0HJ3.nVDV74CD58mlRVij0y8FudMrn2WWqxq3wH.9oVEgdAwMocQLtWTYVMPd29UQLBV3zw7iyIf8_T9qpLXfEce91tqbFergitYgTu2FNbvBIsHaZQr5IkiDpGD5xhz9hPxRVfqkWI0p5i48AhBv2CNi7sZ8JVZoVNp6LTVSev1DO5DrWAKApqLsBhkAt4a.oviOp8rs4ypjCtFzBM_WXmpJDUHy32wdRE4X4fAkbcWBGjBEwOmUmQiyp1ygwy4672LNqB7XLZsH1TbHkCwSQxE1GQ7fkyMOyDjEdyCRE.PjJL0xG9GFTsWfZLmnZdwTqezRbh7JBKon5_fxMbuuFUZU8GpL6JPfsCyiERlxRxAHncwt3kFL72azr_wuRWuREOBs1JttRIXpTbPIKU8kwq_n_pzbdJCoAVKkjUe.RPP78eDSpfesZpaLPfstHYj_HXfz4TdgcLhQRwPFANSBB5UIyIZJESGKUEd6JdiM7Py8SLeoVLVb.RMIw0_R0aec.6N.26ATLDb4I9pTA2ZKtk.tYFPddDXMFsHJiyjbhFSBBgcWUAtJWVtZztZgTQivbZRPMC_0DaBNQWaW0hTdqxjAXJrC9F0mK6sDdpObzFM3ElO7O2seKJ2VJ4pzq_ROy4dUZZkAn6pG5ux79kpL2K.WiSD3TX8Q0hOPz828k27_I0UGhYRGP07h8QqUko6_LwYszEPSYmY5AOhE6D3GrH27AnzCKiVJCU2Z4TfnFwq0t1Vs6ItATSQsLGh5OVpWGWQilVlIHK1F3wztUEUoyWzYYSgBl7mKApMwmuiEvGB.vQR00Is00kgv.EZmet..9Kq8rRXZvFfmeCLV4pJHgrBSeTjCcnge1UNbkMsy1KqKJqZNrCfQAKQLE685LsBklwtLU0QGlPek8bd1sfyT3VHN02tVo6iwt6U7ebO5xnEnD8Tb9qUn5wRyniV3vvx5doIh9XsipUW_bhXS5r6rse9e44fVTPhw8YRGwiZU7epEK0oyh.odfMrPY0evNRxwSO5p3pO2pcWI85TeklVyxbusNBFnBdjv6i89Rfp8VgcZJM7OIZw8ZRgm1Ym3wSR8aZctlR8qL1W0TNw4uirado_9cqPaUPL4cY2Y7.ZO.6pyQeHWSRRlWJtWqWhB2eThArGZEz18MSKHti_s94uoxrzmqEEC0e7mMxfWFSX3VFPwyBFlNBEaY5ZpQGxbFSwZkUruZM1ZjD7Qk3nDxHXlgdj5cDvyUtP6416o2NckQpqAcZE0YUSEPWLNMUBZVRdy0n7DiopJW..0WXH2B1cMMO2GHM8_onbR6ueJeZftyC54lb5WFGXEkMrmJab4OdqmuqFc6Y"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100f7afea25d46e';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\/7428306951?__cf_chl_rt_tk=sXD5JiyiiGSe8WTuhDKEIDDGDibWAT.lWfuioHp.p.o-1739241556-1.0.1.1-F4yErR7cIIyA_fcOC8rAy_TJ9RIJMSzSb9a3m9bf1Wc" + 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