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-0793248651-gov.caltech-edu.pp.ua/post/884798398958

  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-0793248651-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fe3b865ed35934',cH: 'puqCad9Sk8mI75SrJmsvaWla_Xgfs6FA._Rdxkz0O.k-1739212877-1.2.1.1-LDFpbUQ.KygCuNioNiVKOFpVcjwDxyn2URzqDW1V7PIUoerbqfhVRzfqQZpd0HI9',cUPMDTk: "\/post\/884798398958?__cf_chl_tk=vRaEBmhb_TRfUNDLMGtdSP7Tzj2SWJxppycc4_s_CIg-1739212877-1.0.1.1-mC6VNI5KsueolPqkqALaNXQNcRuJqZ0dXbrYPtKNJiw",cFPWv: 'g',cITimeS: '1739212877',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/884798398958?__cf_chl_f_tk=vRaEBmhb_TRfUNDLMGtdSP7Tzj2SWJxppycc4_s_CIg-1739212877-1.0.1.1-mC6VNI5KsueolPqkqALaNXQNcRuJqZ0dXbrYPtKNJiw",md: "Da_fdyVJv9_OFRxGgHtrjvh1iakiJlR6xwkGkOTi9SI-1739212877-1.2.1.1-vmZXtGnjCuyMRVCm10iRZ_JeglIL8AFGy0C1MAZrNSVtBZ1fWUgkatKP4EO_mU4FIKKUEeFa5_uBIrc9C2OavRrorlMUtNDEbhDm_cF.JFZajxA73TI2j6OfAfwihNROFz.TOzxL8s_UBH9ASj5hf54xfyVSHkCEC42NVA.bhZTTwEz3G1gPhAahUGHdWNDJ8IA65Ng8P5aNxIPVxGG46h2V1FDwNjGT55ocmBS_XKjK6xIZpf2RmhABXqagEJSEZCSgmyjPdqgXa5h.5pnVvMBecXrekR8mPkINgL1ZfO3QHz9.iFWuwycyaRohJgTEqQ8l0r2wCaBlgdNPgfpaF__471kOpZa0N_iaWFxMnfipMv2ICXS31K18Fp3vA83.a4XTsqBDmAjabKGfWLxBGYeO9vG7xcV1OUNy7YI75MZEU4Ti235PuaDQEL82gGpGUfdmt0QuMN30Drkb.4egISceXwF5tECm0T28Es6WDNe0o9LSeAAIhxOHPGWuyKSLz94ZeYXA2hds5wH4qBeXogj2mcuQEMSwUnDsaCgPycAb3ABhDZ43EB4q7BqgXgMJaEt7HEOrEHXNRR9.3IWS2T86wEufShwnHInTmjImvMhx3kQGLIoHxwmffXUCoJ1oSBP5axEHJSz20.D_rC1qH5tn_kVlAslSOj8Xs6hnAHK9FFYbUviBwoCBplVD3gIYFuhHCwE8hBksRCpA613sCPdL7Md_eOpdU_e4OUXhFltQy93y16EEr9GL_ESWwJMFucA3gFCJEMH0592XEefNEg02NZkLqmUnfgyaWtPzzdklqstUalB2Ji.WUME8hicGquc2mCFf1tmrSLefCkn13KJCrbe5kihxUXkRoMUr_J1I3kaTs18IRF_Bgs1_BX5R4Y_SSS0nIa8wdiqGuQPewUJ02NMn2Y9WXldjeqz5WBAI0bgNLAD1MVGhhNbzNyQKJ61wdJvg26GRobqb8YPSozmn3R3_iSZ.Fdw.8x3O7dGy8qrlJd6TkYfz_NI3WAH.SYM6To.fi9AC7sAD_3ZVXJyTRsjvBSalKcnbUXpCGO41_m.Glmh4tdbkqbtfVriJ2fdggZsiGpDrjPrJ68fSVIg9R5NOfXuc_ARzaHF8DAOOZwjK0c7TKQY25Uq01..fcCN4NUy5uWbzQXkh2iD9cGJMIBInNzU874hDNgUQb2PPDBrw0DuZThMhCSybZ_U0Gt7eZjlvhFtdWPa.PP8PpYfVaMwNlhDSuqXX8By5ddmTz2t1D.hIi1qgN8eIXywYiUJZl9HlKwDmeRbx.Ifrws0xAeWVN88EzafNxNPB07HvxBjWX_31y22.btRnyy1OkF0Uce_mRWb.YYAikYvpgYvgPt4Kw6P.pHbuJsaePiTHVSjfkiTfiXwWYO.C7y8UHD9v9tYazU2VkqqUfAigJGnAkKLzqozQpMKC92pF7YmxkMDHmwaBAwlIsKL_LNSEz_2C2rkD.RtxBV0uVQKNIUUzZdFR4jWAZC1ejMb2W.M6ZzrXKQ8B0GQ94dTr0kXLUAWpXxzX1URrNETirVwGrMBAxMEzYVmtU2miF6gFm7.7qC1qlxjWNQtNiAqWh.6J3Mv6LumclGIkcxayuIDQsvTe8SmLzR5RSH_mQGUHghtoBnnt.Ihzd6UkeNRq_MiTUphWDqHWoF1R3stKUAHQOUoKGRNkhfLkZfa8So08B66rZzAQKCzD4Atv4cMmv1xJygJMNcviFGYE2dAHhuqrlk0lj2LBBZOmdjsI.8WeZlnyzk0OBjVuhKk_3vnMwh3UAyhEa06ZprNwdMHPhTH.DNAxoLXT9URNNMzE8UxRfZ.lRkK4fAiD.D0Bz5SdmVUZLLboLkcGLVyZITKElC5kA3HBxym8nA0nG2jb2TK7hSYJN6e9zSFzcfv4XcAuMvYhqqIzxtHsMknTzs3M.flwidxYtXfEszCq15VXP1y20uKaF2pxWYgBgTj4d7ZTeTubcWkr2ZX_FmRDlHorbbbvRKD1ZnhK8npo4RKhNtibQqcVx_fH.SfF2JbEZh5qliv0u6OCHJYkBjKowGgymPOGGikmxHA1nwYPEGvoQP4RnIUmGYgFxkKXxVtdKqsVnqSHGPiXt60l3UDRdx4s_v8_qfo3P.FXlvKoUslMl3GAl4CWrMd002at_0i0cT9yUsvPbaV.eKk.01SYZ7hRHcYghYGj7xlWs7Pt4y4cSatJgSPKpU9.Auru_M9eDufGj0z6_qHEAUw_2T4_M0fQt0r6eA",mdrd: "oenCJcur2QjwAaA07V99CQt7cLPvAZqlheIwIzFuvZU-1739212877-1.2.1.1-hl682BqXbW1NlbJHIWtFXnbDDP630z21By8DLAxnjjdO9TX_dA4AQ40BK2mLmueArjk_Glz4xR5G4R_enmh8nm7m4i6F1DPiWNRO15GaCwioIwQrPtZGqNU1lqUsEssCoa32StONGbzjA3QmELMQsCy4_1ccSTH8SZPlWbnp4.cufiOCeYnjN5V7J_Ia2uh1V_eAu.0fNcdi3i9uYc8rFPR7YW0aCKKoF7s65AbngSa9idjSNQd8BjxcJJfbaxnnIIfHn7TxLRAhcD7a6WtRyo57b_MGzONUhKxoeW1reUZlbe346jv8ueSLQnoGz86gZZMjqO2gPz9jynoHfu9Pt8zETHTX9W66T52qdEGEceA8kzItuZqL56dR8TvVMaXCAPEFW7j0MLd7HibJLpM5x4QcrWjdEHIDBm18c0S2BdW29j60Tt0uPvOtd6wHuYvbcIhQh9pnmuF7dfxhB0pf5nfwijHW3MP3apzvuYshnaveHiVu01xpQ7K4wPML1LTTxTeELXyVUgyZxGJRqkjMWom36QXTX8off9HH4U.vNQ5zgUUqZjfwXBVQpt.aJykxrDy8cPeUje0BVdovUcAxcBULVMO.GZE6ivTWGp2DVURaTHfkjTB_EunlxC_Ol8VWFTHwCkCU7uD9m7Uv52vWqiaedTSnk2ygbxOIu13JnjrmmOid1MQBgD_JzBr6NVSF5npCCWPme2ZpFz5xPbvBfsheeaojgRE7BBDgH2bqu_w_B2D3D_4vh6MKjAZlBmACp_.B8S_mBqdb.zU.zgJyCoYTKHA50EqfqbejprE31K6VgPIkey7vmxzPLyuD90RYw.WF4hPqdDaogAVr6.rx._GTkqiZJFLXBWjZksSq2xB5S2fSjiozX2xj586GZS6ik2LlYYLWzR9fLX1AjxKcskP4RMMEsqWyBS7ve9awzOl1qx9MeMYGUlg6fGipgRctSE4g5762UO_eSZE216aEdgVlvjOLnX0Yf9jN3Lkl2CiRfFEjza1.RfvbcYLTmF3fmL2yCCBsN64SsZ.sQTQqLL1E9EkK9ahl1Kque0RDBCDSyLiIvviiob671_ndQ0RbZ49qhzu3spbb9ghBlMsw58EfVHuxUaswypHaq8L3.d_KbCQzRCA1x2WnAmrp4qBFtnWfFR0GXouIXi2Tsv0Vo4TRa8k0eh_EQo741RkyItUJRrj08koTN8EuvfyKY8AGYdXoP1hOBZygoLi4bEQxe2oucpTI3D2C.Yk0y22pA037JKedlr4NL.b0kqPsHSpBMCV9hsScqXu3b3slcQu6JUweqYU.z4G9frIqdDMBZqmmKeJS.8keJBQscFokg2HLCHKMHl._4P_vW2BP.i0vHBbK5CQTNj5E_g1_nnInXJthDCEAIgrMvYxnJLP2QIu.12vgdDrHKI7UwV0T7OhtkLzUN4qEIIaGqb63w2qAuXZ7Vovrieel0TxyOYozRhAy70UIvhggdSV4fnpPG6EDvQEkVAiNJQDm8HuG4dvaNmA.VXakDCsZr2KZNdwG4F3Aj5lR.NZluo8qv43Yd9Wp7Jggty4Sm0X6MbIEjOZWR8C8oRxvWy7aM3bnKkoj0_TgB6WPEAyVMOTi6BDe9CjENw4zWD3cnz2.RWt4ZXZVrAzIC3eVgtiY6bAwm8fYvBszWjgxgDLYYvZOJV3nmBz5IQVVYQbkcdJfWJ6TDp2W_A.Z6qHCRcsei7XTw0FhAgDY5DLgva9PEYEawf1aiwUi1Mb_i6ylthkmul3jg3x99cOj46lZP8YaqqnAuD1WnEIgViLgqoqjjRuwPixVh8QbvoeS9CY8Li15TCn4iW116dE"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fe3b865ed35934';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\/884798398958?__cf_chl_rt_tk=vRaEBmhb_TRfUNDLMGtdSP7Tzj2SWJxppycc4_s_CIg-1739212877-1.0.1.1-mC6VNI5KsueolPqkqALaNXQNcRuJqZ0dXbrYPtKNJiw" + 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