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://blog-affs50ex1.mit-edu.top/post/8217369540

  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: "blog-affs50ex1.mit-edu.top",cType: 'managed',cRay: '90f86c17b92320a8',cH: 'LHLkBgwZAYwS6Q7iPfMQIPjBnN.xdXrjQK4.b5BgUZw-1739151952-1.2.1.1-T_jXwbcPsMDxX61I3D.xkHJchzNqmLmI5q2RZdoDbscV4mxl0t3z0iwK6Ei1quYQ',cUPMDTk: "\/post\/8217369540?__cf_chl_tk=aLs7O89ISh2pKJ5PXMjTKH4bOvwkazONygpOeTP37Dg-1739151952-1.0.1.1-cWPvxwYlkmDuuPEUZl3LP56L87tSb2qlKZwf.5p0Lms",cFPWv: 'g',cITimeS: '1739151952',cTTimeMs: '1000',cMTimeMs: '390000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/post\/8217369540?__cf_chl_f_tk=aLs7O89ISh2pKJ5PXMjTKH4bOvwkazONygpOeTP37Dg-1739151952-1.0.1.1-cWPvxwYlkmDuuPEUZl3LP56L87tSb2qlKZwf.5p0Lms",md: "tNClyJXCKwhkRhJ4L8adpBukNMzE_MU.VvHaoyubDEI-1739151952-1.2.1.1-LSnPcAt4KPAAc4EXYiORNqQ_7nhMfSbK2bqilxBfqMC8fHYG9cDVkdm5S11Q7iVJ.tpbJrWJqZjA0aQIbupcaBgmYbyvygpmCJ3rsCWXatHpRgnLwqwrr7QmX63IGbZ8eERMVAfeiz7rp2Nt4uC8u5jiRBJXHkv2Zwa3CirdJt7L.0UedCh_z5HCR_tIePEL7PFfFpEiNCerFqr6Khq7SkjGSaZIH8ljqb7pm.XMa3k8aj8inYmB4luEuWKxkBJdPJDvsVPXWYOG6e3hSyB3ZEmLcSnkPB2XcSduMSvLj5mvK3b9CljxP9547VLm776GfhmMnmZmremdRjvYlpNS7VPla9RugqOuBxrKswHyG6XlRgIO9yuMh0WGLEwk8EhjYRzKtlV9UPRNqNgjOVCYmt1s7wYlriXjWz1lAyqcN2kfjt05AE1bNxIKY7OZCrRuTC1nAPRUYPCu7fPbTyd9RzxqnDcqOzmJXTul2mhPmnEPvEvyLZeKDRljl6CYJQeaA8Rz7Ll.3SUgnqZ5qrx2IZtwUKIdvKHeU0LvQk7.h7CSHU3CqKFG_6syMeaHNwrbCqaQ.Mw9f27e8COhOyp7EinmNf51Uy9v12deweaprA__F3cpzPM808dgkZeSdJqjd9P47_bUfXJzlWd1x4gCqE0YaxSuFbeFiSMgBlMChf6YcCTgwUoEeB7z5Dvv4p_ByuzWuf52VLkGGB3675q8mput_8tSZEYKwvzmpNSfG5FdpHS0dvTp5lIQ84xhi5Wv_YlXSu4BMHkjrJdXSi6aNNgvy0KVydu1Wxc7NlLUFrRMwDt3uFaP7tC3fSyBYCGFfaTlPn6LKCSejrc0xofvSP05_4fft1jIigvMAFlsX60UuCrGFvuUJ5xZl8dtN8RsMFbHkWD_n2J.mJ5GRZSTd2YOKy2.yxrNpZueUiacLpZUvDb_m9v0F18ko6_5S.2e9Y03m6apkfieONPFCZDS1xDG0f0Tm_cGpq7AG1BEO7SxCtluUF.M3.bPz1o8l9G8Yzd.DGIXst773j0N6lTD7yvhOUy7yVKA3TwLicVDrwOxBCroXKkjVJJjxjPHMxAfRa8fzgeZVkaKItC5TBri32WPxiP3Sg2VMx2pZsG0nkkF8n4ve8z2BNZQziXtL_CB1yvm_GOP6pHrKONWMl.6xRIhSsiMVsuHoZKt_TzziC1fz0rtEcvPB80RmiKfzZXjYFp0H6IA7YtvSEbgMQEResVdBee72wDLxOtSYzK0nx0xIyDM8m9BOVVkbsoACeFX74mxKb6GcuXBevybMCIyh7Xx4w_G6aH8mxc_ZJ2oQocJCFsk6V4nFMvawlkjGGFAfC0c.xJt9C1OF0_XVDb9_EPMlPXSpvVOvo7a98ML5guYiZ_JnppUBDlECcBsXo7gUw2PdxYBA9NX7eReGaQ1mpqxwHou6Zj0KRCtpihapTDBpcK7l54p.xRywYPbEjQTzvBI465c8vkesUb4VlfuzGtMJqzAOCcWF8.PZP3mJ7DCaenzqR3f32CZVEpQhdxbBBVW8Mr6.4dIEZmx50PJYjFnNTX7cOfOJAQSTWL6dTLRR42Cl6rYGGBP06JjECd1J8ajWN7stEhcrd2jY1uou_EpN7ZjZ64M490.LZSZ8LpT84ID_.zHXqrfvWkwbxzbiiADAV2_MpifMP5C.RPA2HazZbc5mgSHC9KyJimiGWCovNPIuA3sovSs7Ta1l16831Zx6PPff2ljwW.9ViqpPxsZX1JPfFynm9QiqI8ZkE5sVpqPBKhookwA3VB5UvGxZg7mjAWxlmdaZGzPCWfHhqo9AEbc2EVqJkl27fNtO28yaay9N9lbdJ1atnnwoxyDhyY_Dxif9mrjnW_3d2yhNq.AhKm8TCH7Nk4eHyihed3Y7TAPypr_fINqbGInQYD3wzkysI2Ful.Fkfqbq3mU2k3ahnog5afhFkkA0ZeO_nwucWDI0NQrW26EnHW7UdmLSRjGWjuZh34AC44fEcwArx2kyeVhXmWBRVn96x4N.55pmWeLy4IkTeUXlVA7tMG63bn9Oqo2pEWe1.4FFhn3.3tTRaxTPUN8R4sghvN_Wdtg2pNHme9oSmfSUyzHtADAahsfHLKmPZ7f0xQVYubURNrWcwK9AB6lJskFChVDtnPT26lPQXRPEkVzuAwni64h_3X6z1PZkJq3VGnH14qiY08aEMFrInDMglliiPIuH8dwuqelvSb7Y4gVlsxov0zX",mdrd: "GG8n2z0.fP8UuP3EWuZzz5NV2V4Vg6d9el147xskOSQ-1739151952-1.2.1.1-7DjuEMDjkZ.4AGx5z.dH30EniNH8LoYynSYR3IgPrp5kCJIEdfX78MlJHx4ZC7UyNmCNnj74AkzIwah36Uwso4qy10sMvg1CRteg89CG7Fejgj2o5hFfFGaKZDhR.FqRJv4.W.AxFA3CHT.HTkhIECD9MzlF4and4TsQq1701WxkcUphLR00pGSmmwQFUArnPfTvj3iRb1gK7dXgLq6NHrIeY96kz1b5peVwXYTaIwYM5v5D5tVBH2SWhfUXGOS1veDNP5KABnRqPrGHwfjFKhoxibvpfT5P5655RrJec3q1UsPzbiuE8hs5kolpBfgymwCYx7kiCm4Q1mWVor81bLqLWVXjdhz2XjhwWhGHYus1SLaxBP4Gzv6kSsqvxAWlYtkzPFA7nBqaEsJZXrU_QoGNTvsg3.Kdlgep0atGpULTA_Jz5xQRnWnyQZZRBxFw82NR11HUWY8_NYBtoUdKgg4pmMob7jRT8CZBK4xtbgmp67wRfn7W03cjCcvJQwB54K4ipG9v9uHfs.3VfY4.bAzAscrjmEr4NUrF731vIHpayuu7CgNRJZqu22L0NcBZUkXQihhE93IDbJG.hoNdO3rwJPXntE.J70BT0xCTuqBCKLWQp7Wwr1yUeZjpPKadMIPaDDHIBVlensAeLfzz5z63VXOjBi8d_VxBRqvp99osDgOknKiN90yrj2yvIVi8xaQoHiSaaBX2zhkdHMIG4kgP0QKLDJ1WdPCZ0BuqMlbJO1jjU8XWdVyqmYRevrNPqnTYRyeZS69LQcdSwd2hQNcLjYHu0ZL.2g9OriXC6ZFl7lb4RJj6AkwDy4VMGMEviAmOJI4X_.z2F4PC7IUXyYFwXLZv3DXWJPJlXOmgQ6uFf4Bd7OhZxz8UC3T_6Q1kGmNZNoRGW5iONQtnvkFnYb24aWRUlF6LsyxhDkZaY9528cdLtxJ9sbTB2tZ9admdwHkcxh1XtEE3DooRmN7mEtP1KBNyJ_BHrP9zBlkZgXfrPQH59x35dvdQXAh4SVUopA.CV3SO7WyhXxR1Zjtdn2iVIkSyetWyTZVWI4Amzs8FMEdLQCqU5pzHWnrPhFQLF_ygBznehKfwd9QGOw95A3tTDORdNFTh8a0iCb3DSj1ZEw6nD4ibdShgDQlnJhAunjQgPK_CowKY7Pl6UwEEt5JGE6nh8sDI1u9w3rxDH5.7_6DuoPBJDjKpcUJiBVM4piCVXbUbMWjqWMHBeD2K2afBnadLKn7J8CA.IOOCF2hHg7Z54LHycEaGxKQba5tQstGUB4E_1WgIm2_JjiTx938z_ZxwJDSaz0qbommUrsrR2mDLzsnqOOJcM3V2JI3Da.PHvyX1.x0kAKCWf.Nci0LJfc9itaSL5z3VnRHz6uFCIBIu.V2frGLZ6rLqTIrFDYmKwpN5Lywato4QBVVrwiyZGBjmbsS2MLl_eJoqw2ygAx29r_5yr6gHhnYwndnpe7Pe3G3F8.vRReqhhxIQs96VG6oMJyOGszPw2dv6PJ3YcViVLgrQiCZW4Bx33QKY65SJhHi8gSkYqDaQe.pUj6bZNkkcwXTvXl4KhkaRuMcpJINX9nartioZ5kcAwvwsGrdeD7Sco1Oj8jf7LpdpN.xLVBy4W0eo5k0xMFpnBOqKE2mKbqeF25Tiv2Y0dfkVy2J.E.F5VNhyRmpnBlCE_8z..uaeuRZLZ_Ps_QGOxYMhrsYdJeN6V4_FPRSmKmaGCOdqFxFTHglZFIFwOJxk5Wr8wdSKh47ASZfXlCferZoMJ3aqY0AexgzUBDiGUDaAgrOTRroq2GYV_ykYUvXQ.vIopFH8PqAr8rrH6MALXaM"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=90f86c17b92320a8';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\/8217369540?__cf_chl_rt_tk=aLs7O89ISh2pKJ5PXMjTKH4bOvwkazONygpOeTP37Dg-1739151952-1.0.1.1-cWPvxwYlkmDuuPEUZl3LP56L87tSb2qlKZwf.5p0Lms" + 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