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-3094752618-gov.caltech-edu.pp.ua/post/620178735004

  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-3094752618-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fdcbb17d31c599',cH: 'Ky3FmsMov34sbMszf2LJLtQMLHQ597zQ2Mvuw.miNJo-1739208297-1.2.1.1-yv58_m0ertLzLcaL2FkgZse1YQIw1KOmoM2U8VOdTt_UGZYfmk04Gx.zpYxxJgnn',cUPMDTk: "\/post\/620178735004?__cf_chl_tk=Df9P3rKIFrsS9buIqXiUJ2hoLkfHkhU0YN7.nEzwPbs-1739208297-1.0.1.1-hlAZ8WETh.GKEImYPm6h.p9fC1WIkTP5uKDW6vpGVEM",cFPWv: 'g',cITimeS: '1739208297',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/620178735004?__cf_chl_f_tk=Df9P3rKIFrsS9buIqXiUJ2hoLkfHkhU0YN7.nEzwPbs-1739208297-1.0.1.1-hlAZ8WETh.GKEImYPm6h.p9fC1WIkTP5uKDW6vpGVEM",md: "nvQdlQ4RmA0SkQTp4KzdZebtI3Rl3Eq383uiBwGbI_Q-1739208297-1.2.1.1-qaTzzk.3uxxdTZXIBXIKHzGA_TS_vM7hmYzZYkG124QMTZ6K2sDn_2sSWubpRvr2a57o6qYpYvhDMTenHVo3SWlIOvGuhSt1aRAnI2PgwV1Xv8mPtCtjrzDdFiNdEzNxvHUaWlJhdlAY_tbeC9Ranvz4gDfu1j1rBC5I0p4_ihssFt2A4.TZMkmi8QOHvFEzCzZS_6RB_8jOaHRCABb5izVDuWsq8pTZWitnFUSvIzZppM8kLWPO4TwLKcAQKNKPIHFKn0tUE00ma10EqPefAHMcuE1idfMfGG3OTflzxfIQm5lOjwQ88pppnuprr6rkbXt93KSKK1tCqLHUPDV2cFFWyRoXeHeDWmZrnJbGfGmGgZK.4Z.LYEf.E2esiUflWIXmUqcXwY7ZxmTKw3YycjjAlfNlZPDbDAn86.0mVuePOZLpzoBEUTyTJqU9TvtAbZyp0s1bX420O6lbp.PaG8IA577EN.bamNAuIFqC446T4L1m_BQV.WHfipddkEw5nYScRic9nlUtawiPP5MUKs1p2o3HRvvbPGIM1b_qt5I0bVfMlshn5LuCkIG.2s9kpZT191nXAO4zOVMKdq3IO7rEBdgvJimjOnyAzfALZQQTpVRbDM8J8ALXD1iSaKJC3JVZGVMF477gzUL6M21AKb4mdarfuiXpttpKJTYkLG4GLCy.ADenmW7z6mAaBLtOLILsYsQE5f14W05sYEK8DgkSsKhnmxJba8iR1QD6N75vGvywfslteYBEO.LrghgB9Mg5DN1OynFPXwfKsuclo0eaL.NT7bp8irlAh8ex9ZJQ8.SEHypWyVmoBrH_qxL5bk7EJFYFzPTRfk0W3ryHqEjJF8a6779cRq0_87I5Vu6.e0WvR1z2nCiCAGwj4HUtEmjBu4tYAlsaBgpKWsWP2EfF4SBA6SVdJ52nw79OrTMoq_e8d6ZB2mVG4I2WvOPKbQkGQJgxlhfyNFfD3T3NSJH1COoit88ATy1sVfDBm_WgjPgVTu3VMZqXoc.zPSyYKC2Ta79Aq2LNr6fmyZltfw2cI1_LQxKaAtkZbVfgLEd.pF2ZZXhd6.TD5Bl5VXZKR5sQr.VxlQ6wnXJmaH7nUeyMARENKZh1i4hqW1i9pS63hwOH1xwdZLso85DH0bH8nlLjlzPh..SjKfkkFNSQErRedA5fgizwu1gTtp2.vr3_0m3odOfvnvUyo.436HOYAVj__wKA.kvYQXT9WeBrzZspD05pwjLKWcpnxQf6I6R9PJENvH3C8xxq74BNErR.exSoO5vJtBfmiirm9BNsig_XRMXWU2DU5EzslLJ_tXUWsmGWTxEMyHSvNEVIQsTRXEYdKGRBQq292V.BRtDpdjaDno3Z.Ngkr_PJamZ7bX9UQZTG25.HkVjGJB26LBHYhA1PMNLUd167PG_61N9gljvcdWx58mLaiJ0M6roU6DA_Gb5NACCk0q_yKnj0kQCwxPcMDM.3YaDoYoiuWAWFslQFfw9LWhBpuh0FqhNOHLqoUORfhO6mxs4KDD6WDJJu1JNuI2LyXCzdYLPtnhyDjcxTdbIuZ5s9nkpIxQEtORr4skueoa15Jr8b1ZV5l1pwJPZIaI9_uOr6UGVs29e8QgIddYiALebIOpyoB.NIVrEzuV6MUla5JPc4PUFsf1twMJtN2Vdc16yxZAYiB9Ea_Q7oVgis34ZYIx8VxClTBpBERaem3X6KzCudDpEKji1RDV9WbciqNA9V4OVJR6FxuShVqobJvz92yBH2wvV669Gdsp9sE6M0hCXnlRi2XXYMSaEm8rhg5NtdZWulVWx8sebZ5IhGlXXiZRvKDzeMP5owUFz4S90kDrAu2xkEhdSxM7IM8RBsiHe6XvrXPlG0yAQoVx.WVJI2A120HUrXVTLFmpUqLyN5z3iM8b40HgDQvRdvooK7qMhdtYVrzzJMb9a2c8_hFoogqmR2NSZuuTBmCIBiMqWFTD2z4CykSjjs9NOCoeNZasOGSi2B073au2fBnmKBODuG.a_08TmB2yjHVgTj8GMxEkKT37zEvDksXnUDHNYMHh1N9rxV7w4_MnqLXxo7l01_ceeHVDaT8MWRk5kZZvGa3E_DmVEK6H4vmHNiD4_U6QwEuW1KoLRZas.KmtgrpdCPY0jqv07BjX.EcnJkCSE1zry43YmKx66D9_VKe_A4_7R1sInuVYFiZCiafsGxcH4CnXCRTbgeZGgRxJnR8Lutf8H3xfgi9GXgG3qInyPw_cfW23l2S1kP0g",mdrd: "SUoI2NG4qx3I5kOPyPCRmWKenJHCAzf5CtV3o0egIj0-1739208297-1.2.1.1-yTx.JKdp7Uazf17nwVuyBtONit7bl_jXgV5s6zoVruz6g8SutR0nEckh7gENv75cUiSH9yOCguACooaJv8V5sOriWIc_HTVLaofpSKL30.yA641_MHtSugx.ofTQ62PXQBS52MPUWDplH3yejjkrkMEAe2tBEwAOfWp3y18b7fSht5whjGmhpqsxF5i6e3u9WdIazQ2bMXdvlzUlNrRzv8eLl2yh3Z2AW7Kw1zXYk.z2wvd45c8LF.fw3G4KKZWOGm8t.s_iwTK9MR7hcqM_rMNgw2.PFeX9vvA3wHBld2WihAb0.hZ2tVRtQOU0nrkIZPnm8oap1KkunuI9brkC8FejaLSA4xzq19W5_nncEeql25tQrWarhFXcg12vXvDPh4Ii4sMMQWF_F3BmItrzamsY7evmxJG1D4qeeIw8Exm6hpfv2UOR0M0dBwSdL8IIJWBqu.tbNXq9a0qAU6UEvYQEZQU5g__Mne50l7DroixxKgBleiXqyl9zyT7xI0bCVHLOeT1GROH4dXVUvpxRd7k9Iz6Ae5IP.Nt1xH2ovePzxFU2xOCozYTyUT9oB7ZrIockJd3YjNDySFC3WSbLjpULFqNvB8_3ljDudj.D1.f4H80nTEYRP_ShqdFLXkA9oA74k8KD2wmy1o_HetqpmWOTq8D0Kf9M2dtCLQb0NsHfeZG6jVYnFAqqi9HZZ78bUFvG06HSZQcw4KREkqiabrlWdWg_OIsBd_RChV.iUm2uH32kFd7_BwMbnnyEwR8OZQ54ftTsr78PwWDhpM4syyv47.hO_J6Tcs7SYCS64WCOdxPgCPaohdZwwJIKndytsAth4z02TR5aUgRBVkP.S8qYMlbJMFjONqvKjSoe3wDAf1K4ZIRpptb8TMOQrpinBYuSkawS1Y.XTrdTRIgQqTvmWHHKpcWnickuYrVFWq6A9hLSGeUVdVN82KO8rq4kBsyU6wmOBfr5.6Dw8nTHhYm.EpU33hM7D_T1oLnGbKAqYSZPdQosi02Mzw0WPEg4H7_oXWhwCS7mGzaY5tZ5Uo3pZY91R4BG7sHs2Uf_uFQicYM9B1KQxmtVG0QTod0zSa9RlKVnVAYw1EsLKnU9g7b92d305srwNIw6584L0wLZR2f.XaxTe7TOQN9k39m15HROxaEirRfLfKztsSIcAu1cJ8w2bNfTk2xIGDBAoipjKoKd1d3BDhiF8injEZxULjsAePUJkQS3jnJwjHPuU4r_mFbeRemSsEdPbev7ZbCqhJJTO.CW8v_QulknoT1PU5FYCfK1R.WKdTZB4vs9r5fqiknmTwPKQAXfxXcU2JWlDO38lFOwtuDpEeBD9dfEjftjSmUX5NXowSoy5E_pA8kPwZORcNWq.j_ng0V2g5lYchcg1HNu85R4jPbzMwaYeT2CDRArVNdk_3QTf3Q.CraztVcHzR33bjeY1OH.4.wVOr7NAauObRLFmVvishZcJegDxd.PHidU0Y5pVgeMcItKG89eDrBs4irZXtWFw_Rc_s9ub4ZqwP5imdtzUdqiUwe7HthoL4QI9GUxT6wC4X4CHrKYWrwPoZgVk21iM3hedBrBy1mrVmncNBpTfFX2uml1dh8f3ZKdOeVrBfeb4fpBvJXJPMhrGHfN7LPlzC7T_pCQl.p8vnDEVNjVIT.gxna6D7cMqPh0N71Hn878ldMTJS6lHK2Hza2zqDpGKRbqKesP5Kj9aS9qpGrLmH0nqK9BR5yxBZSFyUvgln8aiVvcCcD6wKdeLBk.cW1dEgTaeCdIdMC.vkLR.4_i3SHoDlHiv9lAMmsyU9NS8ncq5TA1jrF6Qqnb8VxaSTomnZI9gT53t50qbFMnMgkD7pHL"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fdcbb17d31c599';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\/620178735004?__cf_chl_rt_tk=Df9P3rKIFrsS9buIqXiUJ2hoLkfHkhU0YN7.nEzwPbs-1739208297-1.0.1.1-hlAZ8WETh.GKEImYPm6h.p9fC1WIkTP5uKDW6vpGVEM" + 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