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-4315920687-gov.caltech-edu.pp.ua/post/4315920687

  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-4315920687-gov.caltech-edu.pp.ua",cType: 'managed',cRay: '90fffe642c5ac99f',cH: 'fzAp_3r.C6PFwGsyLMWkt.aInYnxLYxg5DUt.DBbSvg-1739231345-1.2.1.1-HhOAeFEDQlQU8i6Gk3r6hMG6nU8DzT3ifsRc3GHaVyT8uf8bMuFdGu8r0V.Hnqb.',cUPMDTk: "\/post\/4315920687?__cf_chl_tk=.lUz5DYu19AZ10ce_inen8UMDncdpx9jtrtPfy7jeJk-1739231345-1.0.1.1-eqk2R7y0nmJ48L4wVKn0rKGsLX8M5J85TE2G6ya58kA",cFPWv: 'g',cITimeS: '1739231345',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/4315920687?__cf_chl_f_tk=.lUz5DYu19AZ10ce_inen8UMDncdpx9jtrtPfy7jeJk-1739231345-1.0.1.1-eqk2R7y0nmJ48L4wVKn0rKGsLX8M5J85TE2G6ya58kA",md: "ral6h.RhmpQwgZEVu51p9RDxzaXgMtYGHzoTwuIttyk-1739231345-1.2.1.1-9V.CIGdnCi6mq.VHBu2N6vEwkFDN12cNuFwwqye5waor6q2WGFcm38V.Q8eZHGawRUJ7_vv0fHXlhztS663Y5y0hCyzkKy.BNWyPI3GNNDCEs8vbHWd_kfJV3LgG245_f5jXjTdqjXBPFvOVMrKc52Papcq0ov8uNW4roFWUtdWq5h4._qu2J9ft1xqcmI5V1_2aWlRotxH3n2K2MSk7fw9fHF73HsqrfNZxSP41345.R33p_SgQ6RVxyDZStK8HdXRv1NBlJo60.c7rCX.xo8qnenDIYQsP50FjW30TGxpUPGvpfWH8GGknNCDzHnffvr0n76r_pY7kPT__1eVq189O1d5c1TcB4y97eOoC5mYdSaDlwULTS.eRDGoCAZ5AM0weCPnUHG7SOcsUgz7XNPyp1KWcNxf77PNq7le2D06e9H6MIJukYZIes16NPXBPMIO4PyaUnB44vKUPCfem1jqXahTUDBpBbJ_E6teWDJx1xgPM4bQbiH9JL5tegrS8m0jmWOmPCrbcOPR5zHXutKGNLZqgC8rvQuOj3MZ3jUK2p9gZZD.1ClF0prosulCLDIABk7haRobtbX7ICr_sOLAydH3N.6IL0jBYB0B.pvjzOyYGZS6MSwpMrooqo2Imv71aSfIoT8aLkzIvriWPkY5T8xb2_ksfwx2Uw4qHaH2NLXmiCuas75AczeP1C2NCV3WiMeuP7AcDSqr0li4dWGfB8dFHv.55UWd.njyvUTGvg7uRbHItjJv_Yi6X2DMR.3Qv8ej2Deml1UM.th6oIr_n3l.l79UXdL5UFLejNXGIKXu3zzrXgSg_48_Q7FvnAi_wdcjJFEfp5Ffo5CMLbbZIguoyMSFZV05yJIL7.oXn4WOSVuTGnwGFX5rvotAigWEVkwsCdmCt1Hyl8yaZZ2HMCOlHFtXv8sMoPTXhRoBF7LaLJpeacO5vI6KKqT68F92ggxBhxPAV5AEoBSa4MbPrU83330PboeyAwSWAxOOY6DUfDjI6.3Dat2JwgV94R2cNT_Tjvb7WZGbuxQwa4zhyFwLnSpuKzIFIkDeDDlj2zqvYs93mlNAkXNtIPwi8CeogVHRLizlgzxACvtTl8cBqbiGLs_tZod8H7rndlehi3AZfgrypiLHhk_aTLdVHkx2pOwsaItD3rpZuAcDhBQ4gNpOQsCiuOTPbYVT1hAC2xlTaa2ojEye3kbZVQ1vJ7093PjZy62FdU9jG9G2RoiFPTkdvelx0X7HAiI_bmFYY_5Srrs4tekWVq0ePG9EEqXQWYtDbHzmrvV_QZyVQeUtvZK4_4si.YNU2pcE1LhU6B4TqQoBKdpwtYTcpnWi38vniTOCuxiBN8rJDnyegr6AAWY0k92X07uioJ8CGD03NngP8w.N4mJ1pR2GyL_7GgJdFbjy9Zle1WUruer9R_ZZVJIlzIUR0bsiCG1ngR2V14TMc4kEtKp6FzwobVo92OxkJGYo7dzIzkNnD4zklk3IhI787zpm5_6LAlSpR8_5zo3VI5uhNj8UJ7BjadJYfh488w_bkM2k9AU4imk9CkIgdXbVfal1KnYgyGdgCjnKZ3.743_wvirT2vOym8SQohY8vGdLJbDRNP4hfzBqCCY0u1TF0HHuEznwNeUayFoxkkgecK6o1j3UCQeJJw5aVWvQcR9A7EtbauqZlHoalysiUT6jliM0aUwrvG69srdk1NQfWuB8mUJWb6xSlz8xxZqyqIeJAP2HwKtrJVH6Uds_Yt5p9U7olfHq7Vj6kQXeGDjmuzsPxr5mKRajLxIvyeX_ViIbmfdPLHaCpmA5_0wg4KfoivEIN_fh.nemW4x9sUlwBwfuAtukoRqyHKLFW3vn3avFy0HNKTSiOvaYBCENL8LcXztVfqGXKZ6YgUfgh5.2NdOkJNs2hg8fUlxXR_Z.nbXqrVlg4Pz5c7oMCnHy.HZC0TLIsz_uazIrCaRAZ3072dEzi2vLOHxEHrl2PWhKXrcE0cKkJYmbZENf.LjZoqA86AtIRXeJ3Udg81o86V_KaeHxHU4XYlD74z8zHHcImMnLXbMxvAsP6GqilAsdEi0L62RZn4iRc.69a29lTvsEfUzWncosfa7LHYuWjLZGOV5dc_DNWy4kS7xWqDlGUD9RsnYQPtrt6RsyhGfH6DOVBqb853ReJdyTGzCMODk8zFNhuQYVN7a1enzGYhuKuF3kHLQRgR3jzokrE5O_vD90QG_GLB2niboXEHduYLCITMUDPkypRWGSs5jYd_A",mdrd: "zdC2bYaz85KH74YlO3WRAB2ZNASBqJKrRQuyd1XT3tU-1739231345-1.2.1.1-8QmYp9kDY48BtyNpVECSTPiUKZia4dHeebrH77.EwzEFa7gYrvsUP4N0zL4zE00Rm7cGE2YrZ09o_j2rNiJQmiTWYXfde8bFTIzEgn1HMAdJZtSR9QHjc3EpacHMHVXbp4KPVayy4LuwcWgVVbRLxzuKoUvRq2CaIMT34SKvjHFGfClX_JC_dD7JXWWBnniCKYmyD3bER3rkipRgjWL7aq7CotlWYrOPwiJtpRUI_IBef0uSpil5HFfUV_gpZZFPyGryYWcI9O_vyP0ihOj1J9M9B.e2AnOKk_7Pns7bs4xY1ci4gtzsMWrnCtPE2BA9DKsngPlENEG5_F37FAIDkDI3BWNtHxuwvwYbJLbQ8S3YNURVdQYeN_5QKMkQB.PpNHzrdhmq9.f.zS9lr49p_Vh9Iig2.B.s3NIthutEGolmfGuuphS5sweGO0424kv.RIsUQAXgsIT3vOELQLutU6IACwO.3f5P4IQdQBPea02dnzXHyOKc2cU5rphxa9LWI2WFnLwPDfvMHS6edFDGpmFAN_0L78OxIxvak0_H0V.LZ5G5XQYi6wArbTTcK.hF0zuu3FyOjhx64m8u7YMntCZwx_zsp5mgdhpoYJE0vU7Jw55xexAabPLNeeGzMbovPd9eGvHRyjv9ayfrbUl2UzokAnVl4qeKq4cYavxl_NPHlKzKVuVbSEf69YnH7zHAn38V8f60.Li1DRbwlMTyiT3.QP62gtDYBRlBk_TZzLZfCviCHyydX3s_G24kyUDeRiypg3AXuFAZ8D4_3jctqR2zfnAg3ZxNAdc_umQyKl6ESPYq32LRTWxCIrFNauNp8FlNdrxNZGO.vDS9bfnS1lmOSPnlqQQSMAZHYp3r4OAcOo2V6T1efcswRexYcWk841ubcw2RCa5y5C_IevpDXjvAQTlI.U9lGz4wvdkICtWOU98CeBCwnV4YBXCiW3enVYiU.VaxrsWhZiDD8gBgqGO4AB2GXo_24XdeLqkLCZm5pTFaJuBKXEEsjaIhYnJQTv0ewVwSjfMXEAjVkHZB6HAPxjAriUnAcE23XyJsVTtK_zF._rdFDjBvZHNlzzqc3yAeCXSUwJvzbFvFW_KImIkB0LHsPaiBgHC83od48yx2WFHV.B1H4nCSCFuSXlDFYLMPwqBe4o9HVQ0wASDyXEKsS3DJXMqGdMAoslX1UV2hZlZGr2ygcAR8smYBQ4GLsOMw8HhXtV2CUQUIBhnsRP73dYBY47d7CLhadpCqjJldhe6bCdNQMNFIJh4Me7gxHMLs_7OKXWgbQPfwMXTqxdmyzCIrpRUNihulS468bTJK.J2NWPFGQNooZbkAL8TbgFTojzHPNMtNHZBHxbcZ_xvkC9QPqLe30D1f3DdoEz.wCbhyEHporptJ33lZ6.MRjQ7UV.rgIDW1VOoVJdOWrtPGbuEDJlKzp7KBS9C1_oMZU6PMIo3MOHzwQmIl1jiJJgwvdrvYQgRrF9o58jQ_lc9o4DBujJ8Bd3b8e5dy0R54VL7pO.QOVC0E8WyZNDlVZnxGxceeGwhatatX1slwS4Jw.e.S8QLrujwuE99v7buERbm1Sl0GXtjMr6I4_icU2JfNoMTNn0Uj27SUJcagPwVcsAd1SUvUG7isUrsvpx3oS2BTBe4YNAbkBsE1yS1ryVkoFAq1CozuNNe9JgfY5nFvn6jqwXFKbvpYH1.YHYHNxe61KiOoZSepdEuWY1q76gpCO9wIGDkEqCDCzmY3H2p90fCdACzUMDwR9RNGl14MCwQn3U9wJFPGwU3z2s6QCBo4Ky.yUA5iIrE7ZHqy1FZFeHdpEvQDLhDmZjI09Q654seWxFP3MDOWklTExlYR"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90fffe642c5ac99f';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\/4315920687?__cf_chl_rt_tk=.lUz5DYu19AZ10ce_inen8UMDncdpx9jtrtPfy7jeJk-1739231345-1.0.1.1-eqk2R7y0nmJ48L4wVKn0rKGsLX8M5J85TE2G6ya58kA" + 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