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-4685230917-gov.caltech-edu.pp.ua/post/731317718085

  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,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIzMiIgaGVpZ2h0PSIzMiIgZmlsbD0ibm9uZSI+PHBhdGggZmlsbD0iI0IyMEYwMyIgZD0iTTE2IDNhMTMgMTMgMCAxIDAgMTMgMTNBMTMuMDE1IDEzLjAxNSAwIDAgMCAxNiAzbTAgMjRhMTEgMTEgMCAxIDEgMTEtMTEgMTEuMDEgMTEuMDEgMCAwIDEtMTEgMTEiLz48cGF0aCBmaWxsPSIjQjIwRjAzIiBkPSJNMTcuMDM4IDE4LjYxNUgxNC44N0wxNC41NjMgOS41aDIuNzgzem0tMS4wODQgMS40MjdxLjY2IDAgMS4wNTcuMzg4LjQwNy4zODkuNDA3Ljk5NCAwIC41OTYtLjQwNy45ODQtLjM5Ny4zOS0xLjA1Ny4zODktLjY1IDAtMS4wNTYtLjM4OS0uMzk4LS4zODktLjM5OC0uOTg0IDAtLjU5Ny4zOTgtLjk4NS40MDYtLjM5NyAxLjA1Ni0uMzk3Ii8+PC9zdmc+);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-4685230917-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fde5165ea13b38',cH: 'J5gDBrY.U9B5W0w1rfEkjqeUlvEyxzg.k6U_RzUi7oI-1739209337-1.2.1.1-vPGKqiPiUFd88L7Na6gijWf.oxsLOaav82pbtvMMxU3DvGhU5cv8gtFCNqrKf0fp',cUPMDTk: "\/post\/731317718085?__cf_chl_tk=ojaij4dLKODLBa683n2PgPDZITLdOjYtFrB243Hnd9E-1739209337-1.0.1.1-lSClXFSdSw0Iy3JQtlkqIHrkzkNDZSBl1uBC1KExNF8",cFPWv: 'g',cITimeS: '1739209337',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/731317718085?__cf_chl_f_tk=ojaij4dLKODLBa683n2PgPDZITLdOjYtFrB243Hnd9E-1739209337-1.0.1.1-lSClXFSdSw0Iy3JQtlkqIHrkzkNDZSBl1uBC1KExNF8",md: "UbCZObt1uHNLheLlrcZTAhZq3TrqbJ.utZBgfVlrGT0-1739209337-1.2.1.1-c3vCBIQqtwt.87gj5eIo3cweTxCk0q8CL3yR4a2DD48rkoAgzosmKWJ3ayvTvr80E5To.KWK7yr.uZEfk44eWQFZzBCjRrJpmieIo8wAxGCJ884j3hDLEPRhK0.UH9zNnX2v6b_uUE6PDPkmEYhMkCJb6bBIQSPPjRnElseXhU8bq33IU6EYPCgkBMupsEB2Rh4LUXeSdvYX7GmbM12haFBiwrffgndONKkyekRxnJOQu7qqEUGBN0NOzPOqDMaqWKI.TyvuOIcyiZcYlnTlb1B52uIVP2LSwVOIgNNiFb5RkV1CyVpWMEV7tgZyTNvE4vcBElKgLxYfXr2bJvQJbawlhJHVKuGWifMe.I60NsJUSLAVycmzB1ITVGS.Y_V_myay1Pja11H8UfiN50Y5hLLtS49P5iQEZoeyKFNa4BsscPsxxqpXhicJASUIivF7h6ThcCnZ3HZVFhWUeXsQN61xV1t6ilgPAyiD.RHYB88NU3AuJTsHIsOtyv6YazdRbfTPsFgp0_Bf7h6Scjtg9l1AIlxvYxXrLVVFOv9FotD1WUnq1qXlk.umWQ1_x9yPiAnvf5NgQ_4f0IqpmFcfj_sGr8YRyU3wGLCKNkcItC1vQXD0btc9OnqY.MPTMj8pWPpTVEyIPuoP2SfnqeUzTB_.iixQArEJjQ0iDCCfx.VJYqxil9tODMVPDwUcww_duHxzK.CtNqscxjUaYyNDlAirGAsCg8KLZ5D0Fe.1RWZCsyvIkZWmlyjS5JyyYtxDH.Xx1ksa29FOCv83hBgkJNdVCXckBEgY7SqU6SY8DdCTuRKNNvAMIUp9QtPRZAxcHHrLWovzTA8MAioqK4ob38kYEHdz6svGAtbtw3yCeiuxp1J6KHp01Efm8RzK5Uamy7Z1Apu8KxHWU2xcK36Faal8GWyxD3B5SQyZv432rMjk3qzrLQw3iHtSMVdr4HFwRrwhM0YH1xRp5bgDsl6SymsHmjFuPdzwywO4FfvFIhLlCjdqfPDZCXWwfk_sUFQhB.DRn1_JeOWO2BEbOIWBX4T5vj2IJhqSJhyHXy_JC3OjxV7ovOqb12..NKq_LAtUXoaZKo53g6CBqpSWbE6ZUyPl8hGchIKNJqE8IoDsBO6gzmJNE_Jazmqy..yOD3yPQjJhO21Om5jk7MYxetPZ8YoXz.YPcxd2qsJmhmnvjRNW19w1LmvZZa.76TvVHgIRRku2dHc47KX3EvpW1mhpTdP6VYWBdfwgrZteIidCuqmBpzhkYyx6FKktPWk8olGQ0fba9ikAh_kPbEO5.0Brc4thmduAjI_HOXJc.5GLnbR_Snyxs.XlRDv6_dSrU2zXAKnqfokPLLVTduLwiVNs0fRiiNv06zpFo4y1YIFO4lT5RrXm1yiWd18lK7QLYx8OE3mshoP7ZrM4rEZge0qNZNp1fi5snbmxXFWNIaZZAfhN4ZCfRxDx4HGU_v9kzviWbrKAqkYgFY8HrvnAMfOBdKVmdykB7oJlakuBrZjhHQ1Qv59FWqhLnGhSpDuCgKT4FJZuErYJiRoq4IhYMik44xYSAYPHMMeeTBovZZA4EuW5KMVPkk.B0Va0Zi4oFbWnBS02wmhT3X_L5I2hVUDI2m3vAv.HmZiQsyGBKb2fHMSwJeadJqFWU_30aOyqXBv1Y2kb1vHn9CtufXDF7yGhEENi8WUZzBIH9qj6MOJk6beSTA6n5DMaXvpG3LtDx3PhmKXx7uR9xtmozbFa1M71Zk2zoks41kr7YoFn68H6OBrels2Dh4qEgtRn3OHw8FlzITccJAmN.eF0jxCd.g1MAMhbAikvOI2DaW.44K5r.QnlqL7fMyn8sedf21AqfpjLxq4h3bbFC90uuC6wlWS1W_nzZYdwXb7rP8grV0O1RevtGb0meqzZrjm8spjdYiJbzhROJkCFI6dYQB4i9VCZxL.d1hVMGjIsfZPjInBdcfAHirxoica1iWdcKTFeqONVI_lQCi9OJA0gnF3Jj..AFNH..syNEqLbjtsLexYWGFuLBC4eZioBn5gU.uyBnFMSVAnoGyL_oj_YzgGL8HWkQK0aGY.VUt4x904Cc9.57QbCeEbjqqDm3bg9GvxjBRH220w0OJriFAHrlERGb15g18F7UnwoeATSLp.6pqB3f37kWLq30hBwUcCgkmwboJqrJyBu6LthB3xtzJOurfHFe01Ki31ZP8D.jvFwweyesXwAdbDOyXMfLdJkpKdNliE2BABw6l3XPdc3Pzs.6r6JRg",mdrd: "JGVZnIbl7xIFwN6e0UA_Z_F3v9kHItCT.dDXS_f8f2w-1739209337-1.2.1.1-.Ql1s1JxDfcOUD2nfLidij4udBSqKtIC1VLUyjVUxL7yYl2NAm1ccaMoyCBjOq_hEoUj5KJ_Ful3_z91g3IO2f9e3Wgymzbhm9VKz3yM7G919jcJC.2ecweVpdpQlTZifCgaiCDA7mcE4u1qHuBKP4WraYEwLiAghLIRSXdRW1HPcFqzvbKNCf4dtW.tuX95OZ6WbU52u8b4QBGchVel_KjArxJbZTcy3HmK4LkjgCnTWskKPsF4iN5j9QlwOfUSIvZqmBoVNMpnt0b4TrbeOI1UM8Uekzyj1M_nEsFa8Im0e51z8vp1ZAyzWfDphx6aePn2mKgY1re92AlAnpEmZZybXX6uye3PrFcWK4kyaxPFPuLx2LICyXfmWUgXwaWHZIkZIukCZ6uSavXH8qz7f0ErTtHarFzZWjNxC.facRl5vi9ElmdHHEgWF.2C5SnPIcmgBNONXXBRVOF257QxUU9C6yz3d_QMxtx7nhVTLRQCMCF.u6GRXG__egsfK1j_dC.H5rBYGAzrvba_3VeOXsKMjfPgxJj703fRpKRlvBUTPTM7UdWTfYAEZSGc0FdooJr258Om4XK3QC3zLJqjiAyM0cJdBj3Vj1pQ7maglc5Ln1KBq9wm3hRPLoM6qwVPexD63t4e8lqfEZZmTWET2QQjFZJnN77iGJZ.sxsmmdDzgN2FhqdoMIAfjrzfs9iZef5DNafK7XfE0rEnmY_08BJUFx2QXYfK7vaGWGSXYiLyQEfEa0DN95DlQrwW5K_YrDKmUu0a4H7oVxQvfKCwh8xywMeINhoAnZm380luMg5i8rzFD4ejbkzc9DydAbg6IVCBeby8JDvcDI2uaWaI2sEwusE22e0i52hq4x_7aXzgdqs6MeYL9Y9G3neCvJPBE8jzDtpP6YGGtTSMTnARAeTR_npLHC25wWMY4s14vSzrDJkU7ybM4Xg4Z89frs0wyjmqyrY5sYbZQyXxXtUFR.OAUcvnmkaJk10mUtFAciSueeo4YXCwbrquoy1ChXi.uzzF30zuTUQgMZcZzN37kOgtIDOPmA6GU9QIpomgxsUUXdNEO8ZZK1wUkRGTsaa1Bx1ynrQbexPvb_IfG4E.szuqwdyglC4hp1LnxbmgxaPMwk74uqTrYhvR4spKrkbGLv2H1RzZ6FmXHcRSYcMgJq_59DyJUu_C_w6GySr_N0YJr5WujPVf4LALJTG5Uf4u8tTwSg7Lpvgoe0fRMNJVYU_a8YoosVRsWkBx7J8nRegmVGdplSjcpHxMbHyreD6sTMFPRVtaQGIrgMkEMYE_lIGLgs2xlJAuZfqEr_WaI7ydhE1OGOSYyQS05Xov1WytT4eq8tD6ndhEDDWGWRERJbvjW5B_JAUc.EiUMdktjG_FZ5.K9pRWrkiuK0_l8xYFuCYrpamEssF_Os0O_YVHZxw3owZaVzzDVtCiqZyBBWAfjlo6EuZiPFeOWyLAuLhcwJ3c8a5wCe9VQJR3GsIS.JJFy2VNPtePr5kUSaPonsH__CIqqy5ZCS9FFTCUqD4ncCwikvkjMlwnVfOYYiYJYoL4yQ.ENFDb3qdN38MeWzmNf43Os8Qm014eNqWtOLqAD3yCJfq6j3ybRxPwCfWutiwcVWkfP4SeMQejtctqFNtsEY8ogHzw3lSnTJr577_s1y11ljF5TO4K7Z_qnu0SL39s9Ln0X0y_WCaGD1DuTM3HpjfepbQ31AJdYHUpn9nL6RG9v3sWG2x.oWGUZZZR5lS5ZTEt1CiSvT7HimhEuRJjfFC6dlDj5MhRn..GfCPI8FLJkMGftPcGlcjPSG.HP8iIDeYyIWGFf8mQX1xjCGE99pviTTcDv58s3L867TvO"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fde5165ea13b38';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\/731317718085?__cf_chl_rt_tk=ojaij4dLKODLBa683n2PgPDZITLdOjYtFrB243Hnd9E-1739209337-1.0.1.1-lSClXFSdSw0Iy3JQtlkqIHrkzkNDZSBl1uBC1KExNF8" + 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