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-6203579418-gov.caltech-edu.pp.ua/post/082899284087

  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="360"></head><body><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-6203579418-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '949e865c09ad9d2e',cH: 'zr7EVHxmUw3xMkJG0eBW..sRSzKeT9p5ba0MN7RU5zw-1748946728-1.2.1.1-R3uzRX0AzzHVZlgVa.aTBBhIP1KqeuI8MQFzV.86_klupf6ww0WeXh3VVbcXHuL8',cUPMDTk: "\/post\/082899284087?__cf_chl_tk=ThM3VyUblV3l_mfBPLeLhaXTsbkgvw7vaVXNsTzrEHQ-1748946728-1.0.1.1-ih9MJi_gRcIUTCPEQ6ll8ig.QW.UyiAXjhbz7khahHw",cFPWv: 'g',cITimeS: '1748946728',cTplC: 0,cTplV: 5,cTplB: 'cf',fa: "\/post\/082899284087?__cf_chl_f_tk=ThM3VyUblV3l_mfBPLeLhaXTsbkgvw7vaVXNsTzrEHQ-1748946728-1.0.1.1-ih9MJi_gRcIUTCPEQ6ll8ig.QW.UyiAXjhbz7khahHw",md: "QlckzmlnUKJjVcAtdMRCn6uw22wuG2ux5cIb_zffJQQ-1748946728-1.2.1.1-E76YmWMtUpMlvXRkpVvH0.61DPO8Nfk9_igWaFwHbuc_XJOrZ4ONoXQ66XkvaQ10mqHBWhq.0BI4CaF04M.m7_wm7gQrX1WHdbNkFKPQAO9gCgHokek7MWfmVSbKu2_hA0JNjgiWTSkZrxy0tjEtFx_j7Z3hdJvsE2SQohi3l5w194_OBsLQgyU7gqNrwsY8aarr6Il8sothmXeSnY.2DnDER2bRFOdUvtVErrw9a4rjHbVcgKOsqZYHyY5JOm6vv7VJqyxs7mkOAL_ZOGBXT_J0AHtLGtgr93gS4_TAhzRJqj4j79ASb.ngVtLxr2FGRpLUZgbgDJWWyqcqGC7NHNKZpJ_CH_e8vH6noblzO5tj.CI3zyLIIMVVnajYxU7gAyzHdbq5iNQaATOJhdRyMWpxPdpnzdms6LFd_E_DKoYIMYo6f37uqkmpKKWcq5hrECp_9W5nIvDAj.ZvNTi4C7VqvyJaEjTJVDvm0I9ZBCZK2rEsk_uyJaJ9zzS1LoROStT.ecl5ZhV6i5fNWnZRJYLG0V7yi95HP3cE7Ex_xOCSEKrCfR3LLEzn6gGLCrlPe.z8iT8li5irN5dXrJaskNGS1JaByH7wl.BHjElbfj9UgQlhMMBCQsIrSLv0aGNRJGKQMXwNHDX.mxswMBVHqznQzYXK7IpndjK8LpXLTpGjyU3qiedYZtrpAJAQigSAzMwMl0WN2OZLGxH1fOXdp1OeT1gR1y6hwwsq0c1g4wLi_uudNC27BxcyQcGLVB60ef_SKPd6d6YRNiWBemEJfUd5GK8QBZ5Ji_G4Wa290A0fxrSxRCFmXavPLQOKA5OcdroOFyTsA1JlJHgmzhKIfQ",mdrd: "w_I.L_P0v6H_ZgvORH4fUR85mAEC1qoP7rEvkfRWOT4-1748946728-1.2.1.1-XqJNUO5uXNlyBaMxH4c9hmuwwNGCAYIT1zoeb_UuxLButWx8nI87DRXFi7L8yyIaTGtox_1CSt5riINYaKs9LFokxZqDdCJlvsFx9jWBxn9DtxfHLViEZadDt01GN1jiw1fRScB2OMnjXDWcc1lPp6iQdiDWhsy_THLe0KwYYwvjtLA2fRWSzGSMCpbfLxxKp8J4x3bZBc9LCmf.YbfQ3QBf0a8UvflhwwmXZ1IsObPpE_.SjO0W8cKk3cpVwqjP7QyP5pI6bpijLuV4VwNxfCthS8aHz7r0CqRoElEs2a2TQE0W7zfYCJO3RqLOC.88G7KZx0T9pvyPDO58vg7uPnkJDqDfvAyNERWDSNbTYFLtdZ0cO82hcKeOZ0w5dAYR46nh_1pug3vpBQE3LfaApHxN4PMqXif_XApFRpuThgoFDODZEYZbJ1.dcg708PHBs_oH6EvIhINGr3FQldswnOomdkNmzQykB9mRvr7cuCyJaHQtZxtDJs6oqw1rZ5s_jPUnqyamssnnUZqON61khMKXwSU1UG5_gw5bLBoPCYk1g6gf0JEmCD_ZlBeQVunlowVHj96achW0n_OBzPvnnoHeLwAJ2tGjxp7A.kDz.Wi_mL3YQFachbkInGfxHeTT4tPbWyB13swXMurOVyNNkjo4Q2y.pLIOUjahlkQvNhFc_4XJ0GHfMGt.Hb2lnrkdWjQGVtCHtDvyQYgSH3uCu3cimVW6FBIA1lDp3.1EaILpt3LZpIEEexUJfam__SDMS9tewHJKsMcwhon4Tr10v_sJvktZrZXJktLfyIVijGMTfrxfQTTa70QwiNEm3HcxWZEOQsgqPYkm4jw4r_hevzQopEOXRgQeO.fPYgBkoeR.bZZiMO3gp0LY2y31404iktZGaD7g5llNNyWGwX4q6cPukKGx7Kk0jUgi0VIHCkvf_z1ZB3wiFe5tHlIBlOLvL95_U6JrAEiMuEbUgyigS9RLiKkfZJv_KGM98jhhMoIpVxIKUzhGXaPSJMBNPOAyr7K_DUVbOtWTG7yT4hAsTDubXmfXdSVvudGIDuG.GjH.hdivR.9fnysv4CQk6nIqBiYTiYNuMDDVwP.c.WJ0wsUXct3nJb33TlqJHamOZWv5CgPNdy7L4n_pgTKDNc3wkV0RF7zbBo9WicoaHh7YwzPRGhREY.t8UN1iWN8ZHuXxdZXwhb3zcoequJcimJZQHVmyDVz5MXM5cC2SBfvfaD4ykVSu6rICmiIHq6urh.HX1TP6F7_H9OOi1ud2eRpzxMSX5UdwbVFRPHCxPB2EtlY2LUfBXq6o93ZiRaj3WYDzmRs8Tq3boP2ES6Rlrc_nXVQ8yFmY1zqKEWdfCL7SeWDd4MYglzC1jvlDTlrXoQRXZrTblBJHEymV1vDfMAZHM46FTZjv5s1aneph38hvGcvTg.6b0r95W3ZuBBTk9jTZa8iUKM.tHBJUnVL.gA7IUecwEg0JqBlL6Q_xG_nhm5neIHzHrfF_bfmLjX8FHD859scy_1C1x6q2WTPW.9Z.Tc4Y8rFJ6rNa9YLhr8ftxN9Vf5ht7uuTYjJicpDYlLEDH7w5b3O_tmVKZQhhWZ_IVyVVGGV.a71p4Dskc4mRgLwXECJP2Jbi0HoTRgbTxEFepAaZjlVsujPfPr7adYKYslIpD8c81Ic6jsNXxWc5ZDQ4PwDPEQ2PwOkdLAqw.nqEbe2xU9ASs1N323C6NPfF2fHdhYRMwI1EovyUBF2.996KkS25aKyoKysMcERV40i6_U8_EoZS41JmRtlko004CjzszVCyIXN9r5UIMrHaRYRUPSXJ3cKYKOiAbNm6GimzZuvV1ydywzg61uobYQNm3YNGfrFMjoe0vN6DWshvGCyKDEyFDJnyRfMxswpk11yMMWE1mZIYb5kwOn8nnxGH3eslMp9RCNX10AIH9R.0OA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=949e865c09ad9d2e';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\/082899284087?__cf_chl_rt_tk=ThM3VyUblV3l_mfBPLeLhaXTsbkgvw7vaVXNsTzrEHQ-1748946728-1.0.1.1-ih9MJi_gRcIUTCPEQ6ll8ig.QW.UyiAXjhbz7khahHw" + 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