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-4293710865-gov.caltech-edu.pp.ua/post/5234819607

  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-4293710865-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '9100e0c87beac99f',cH: 'di.wsMKgGpkekwQc23s5S9fgFGPJQGKV4oHkGDAN.ck-1739240618-1.2.1.1-ukVGnQ..w7Uv6Rd0_Q9Wdw2oQ5I9vIw4izPOiLcbOEmJAd6JHb7oUfMZLUhvj948',cUPMDTk: "\/post\/5234819607?__cf_chl_tk=YBw2c8nwzfjfYujoUXTkgkY_CAfJSV3.G9sUBttoJIc-1739240618-1.0.1.1-_LcNqKQep7fG6fT6pFBSIPSq7lYDAqVyG96qNFAxKJQ",cFPWv: 'g',cITimeS: '1739240618',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/5234819607?__cf_chl_f_tk=YBw2c8nwzfjfYujoUXTkgkY_CAfJSV3.G9sUBttoJIc-1739240618-1.0.1.1-_LcNqKQep7fG6fT6pFBSIPSq7lYDAqVyG96qNFAxKJQ",md: "z4QwyGBjkJ6gcd2LiEb1CFG7Uzq0fhnB8gO34CsVM4k-1739240618-1.2.1.1-cNTvh2l8aw.8mZTwmUHtt_W5ORY.EUE1s5f5HjojE2hhacbjM32pzt6cQ02IUc4PUL6hQ.1DiuDExVZCGfgAKjq3trSWMPY8Z9WuZUpwPJ6SbIH7afgXSoaeGoc2hxBRGKZPHgipMLuQxQQrBS.qfLUv1hn8QQEdoPIXaGB1kkA5i7YHXlSnbDOT5Tt5pxeRzBrjk7CUAg3xXUYOkENjWC4wJAPeHTWErCbhC1Cnb1qGn1WlxGREIZ4Q2HTOyLrS5U262CLM0uTwCa6w0bXwaWAmaQeoKrcehJ25kjX8wiq1UH5GeMcYSHJB68VNkPO9eZRTZuff0UbZK.vr1Csj3klL3tCcgXq2svXXt9Gr_gS7kyxWr0knHsk.uvdMLM_O.wkSQZAqvEvs2vdi9BPKBX8._fgo9eF6NlLn.B9jtFWGWwB60FicH4S6HaB1ApCLzrYijACHhqPXTVHoeAngnOcOlVWGbeSY.7qo5WSLC5fh45z_2yAkJPK6F.GZ_UuH5rEJYV21yggSbuYfw7gWThAnqSGUvAJaSIUjFvtyKwsD2omTSJGTnOxFRAfp01R5o7I0PxFjsHIgnKv0Ge0vc4UtRLwLVDwdwfQNqk1TJpasaSurYNBWU6kIl9qCnaoQuXE_hoA217jPuwe4vL1kQ2QrxrRo_dyMXhQopnGQ9k0w0oOLQ1reH8b0aYgPKtWoEhGhx.NjGcfccOuHwwkTQ3wfITgXIKJH.ZjODNCdE9JTqT57o_gjWxy43vEfMoxFUao8FcGDjP2p2J2iZitY7eVEMexdV103oV2M6MkzObNpH4RXXDVlkSj0wo.Ol0reO6xmlMchIiFuUCZiLwqri3.5.gqUsDPBk7bCl3pPShdBpAWNcr.7C6XPbmmbRwR4s2DaRcG5JNo4ejjspNYAUKXF5XqqeWjkEQIhge8VMKFRjaksJA_gDskY_fbHvTvT9wuIbQMUa8YoVoWTuDCiTz9v0Z5YXsx1S.vtd_lyVv8gPDBR6trQE7AIxB.JxWD54HzI_dxFi3v7c4AVQYCI3iGjTOKjsdix8O8Y2NJ6yoYUX73njJK48rryYp2A8VZLUHjSTobVsRl5dWeuNRvqIeZiD.BHM09qG9wkcB20duaghnVz6Kro_ZXJiE025E8s8RUbuCzJrVseUYrf1NboxBjGzhLx6MnPfHzZhYWWizwDgaNTZNRMWcICgANs8CQCgey5.jwmeOQanyJ9e7eHmTSO0Jy1ik5z6MPfSEhJ_GCwIa_NLh58RZiLsozAj.Qq_NkLTkb3eLUHURx2u2S6WRqmENj6XxaDQFTDDWMwCrsFze7ALb4upEDCzW3cRXIN.06gTVXkkdvKFJLM8yJ1pCKZJ3UznP6qP7H5CcnUijISvvLFvuAHI_.TI5yQmUnJb7McjjP6cCy6ZGDBPZFNbTeYp00IhYhL7KGmNEYU8L5T8liphW.5hXDWhF46H1WRqSbXVN7mx1gUOXkbDfXEATYJEe92ClWpUcZ2BwCIiaHBKnayf0pvonOcwrp.v9Ho9JZTnYmw_iCMnoh8soqgBBunHbvU1P3P9Dl.7JovrIVWKEH0CcdWC6.xPdekgW3z2n59sNhUCtA0g3664.Ur990S95TTkeoWNoKTKo0PGoq0c4rstVsWqKLQDZNac8J1Lj6uw_95XsezOUB7ClGZmlHh0V9Oy7rMZScyoAGHj0t8Pt84NSgfJIVvmtbDiaIxJPtj2UhHtUsPHH2n1Eyx1.jfI6gkDEhKnMs6edX09gnupL4xt9GYS3CEBAGGRIUY_f8MYpWo9i5RJjtQVHokp6jB1oVdC.yBSZRsFP9dsE7to3P6PLYc8QFqeoB_aIhBn3x5Q2RUYRIMTvxZQGrej_Lu1vhixpoPy28O_3UH0CrCDUnhHdfSuzybWmAIdMXPFIN6fLSuOq5cLaY7rM7yejYo3.5rrueSLfJWxVERZ1rNdN1EG1WPKV_OAiG0yZJF.YVDa6jN0imEAplp02TfBRFRtjdmuuFmObp6k234jgJbd9OFEnqUN3Iv6kz8B0S0Hs574buXcKro4B4mNpLNV74q7szJ5tOOGRYUxe6k4dEA8ipy2PzU6yRsL9vw9hcOOd1ealc81R2HdcTRz4QPTTQ7jaSDfV1LGLXgmLOS2EofqQWmqqsBmRJdXi8pbLTO7LtHCfWkDeQSvkTZtNnbEJrmCRt81ht6sm81q7gfr0JmUYcj72Hbq6S0Py88sZgbZXVY.dW.Mnta4BKZbxACjA",mdrd: "BlKK62Z8cuhVa7TwTzYc6YytTJueR1MpYiDolkPG69c-1739240618-1.2.1.1-UOYtwCzJ96dP.6KMHdP2mONCvfI7mwHbbUM4XuQNb2ZGnuTLx.hyVnyCYvcBz5lqND5GBlaAZMJL0AlIA7S6hwdgHxX5Mif9HkcWBvdX8_RZygNFKwNs9Oubrch4NKchjrJgaQCaeWVWgrtxUPFi64Yi4vqlwJ4zWUjGgvLoXLdqCHjUFzzTRdmAXRwblM_dBD2GoHw97YAsOri00rnO.J_FumrQFRaF0WCZBlUsyA7yIr36c0CAqp5phfELrqxUxSqQfKCqWSOR4Jn8F6G1pvXYLDkHI_ZRWB55TO9rLEkDlch_OY3GbpvZMz03GATdnCiZ.9fLARjrscmoQT4Yx_HcLZamn8xh4kAlO80luAszldJB7jdWEBSM4vZhlET.Dc3Aq6NM3BhIsnA4tAyFwTbxuQp26H6_qeiQ50Lg8a1YmqHJ3MkOP3RqzACI2Xi_eY.MEova7hZA3_1nWsY.XYSL8zaWHqJMekqS2TNgqyYicY6bg5Xtge7PCmIVYN.Xl2d6F265NW4gU9Uws7u87FigikqSggqbvCmjY2QF3jKsltm4neatd8BkSXglNmhXl4JOwgoJQ35eys4fWR0fbskTFhn4ZQ_lqeeDetd7aIL1zoIFWhP6UZPC5Fe_TZ1JBod69mtWADwZLgzuNAdD5maTsC4ytng5EDPGkqCliPXs83W_1LDY3ed3MPYxuOg03asi7N8P3URZ_Kfap456Vb9ei584HJCp4.eBkdudL38W1WlPZSEW4.rhratVQaFC16E.qYXwf20mc4VikgThiuIcIIGJtNSXLOPByaZECZ_9iFDRnIlEjMNC309PeqrmnpcGsXfZI_SZ33dPSQ40.CGQFR7ZCgxndkKzajdhByznUkwF8tZk8.09cLVmCSQMjjiKDzzzid5rcgFlouu9QZhX62cloxO18LN9AseGV__haOPwoZVUXL7PsZAEzJBLiKy09m0owX2E_ae8vdFquIruo5ufrjXsXcPzDDOg0DucjKgMQsKNssY60pRiW3KKPZZoCznyJbC9biVcI4fR7aWddOPSJqORyUVNznTERKYjEq5B28of1q6t4E_XHgYXdZI5ydmYTJFiHk2fK2C5g04Ia02ElUagQixVDYcAwFWyuobWifW89iis4z_HP5B3lccxraZ92ISbBo_SjLRh2hj0smBfiYjEyKXoGKMkn7i499BHFqK70tl4R.QdXpRCmXuflQenh2axB0MPKg0LmNiSvZBhyyEJ2RKuB8avRszW.8QfIlRhwwVYT1C6_y5LZir7mGgR.KgUs2_aP4MXIQ1l6Fa6hCq_Itbg6aRnBONVmGsnXd12ccP.MayZlsTx.sjCrimLsT05SHuaJSEey.r.PkLh4w04ias080IxpZI8z0MrG9Ayn7SeZ5YntF8F1T6.l0vGMNY5.6loA9puKty5xqC1_5nbx8qWEDLKjvd18FwMG0iM.Red8zBnOdLha6bMxOZq5Kl4sCv.Asee5.l0JtDR1RzXM7Ej6uBDOTp62WPlQYos1keVw9EAKPVc.daHSuZ2KT1_BZKOeTBjjwk3OT8Yw.YjPQjcQsSYeqvt7ajRvlChOyEg1WFCE0.VA__nLdEuxh22auZy3cDstqiQUZMIzVAq846hv.KctFTnYTsja9ycm9EoYc4UYTQE_GP9a1AKOhA6dK_C2AJhvxA8ZnsNoH5YcxnW0yFJhGvJZ_IpY0AxYXDrDXkGkqptL9WG5UjVdauqdKpNWiddzCTHVwqoiIAO8DPI1Xa6pzTkXEybHoAKLK5oxwQls7I5UsgphBiILmY0ft3YLpAvckgrm73uAcF2i00KUVdzik1RDcrG63sS9B.4Ck6yRIHcC3Lo72_rfv5AmPD0OcQUHA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9100e0c87beac99f';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\/5234819607?__cf_chl_rt_tk=YBw2c8nwzfjfYujoUXTkgkY_CAfJSV3.G9sUBttoJIc-1739240618-1.0.1.1-_LcNqKQep7fG6fT6pFBSIPSq7lYDAqVyG96qNFAxKJQ" + 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