All GitHub Pages repos returning 404 simultaneously, no changes made on my end

[SamirSaad786]

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Hi everyone,

I woke up this morning to find that all ~14 of my GitHub Pages repos are returning 404 errors. Everything was working fine when I went to sleep roughly 8 hours ago.

HR Tools (samirsaad786.github.io)
Main portfolio: https://samirsaad786.github.io/
The Hire Wire: https://samirsaad786.github.io/the-hire-wire
The Behavior Gap: https://samirsaad786.github.io/behavior-gap-game/
Team Dynamics Puzzle: https://samirsaad786.github.io/Team-Dynamics/
HR Sanity Check: https://samirsaad786.github.io/hr-sanity-check/
Comp Decoder: https://samirsaad786.github.io/comp-decoder/
M&A Leadership Simulator: https://samirsaad786.github.io/mergers-acquisitions/
TrueRecord: https://samirsaad786.github.io/truerecord/

Games
Sumi's Journal: https://samirsaad786.github.io/sumis_journal/
NULLZONE: https://samirsaad786.github.io/nullzone/
Sunlit Hollow: https://samirsaad786.github.io/SunlitHollow/
The Mirror Pool: https://samirsaad786.github.io/mirror-pool/
UFO Raider: https://samirsaad786.github.io/ufo-raider/
Lumen Office RPG: https://samirsaad786.github.io/LumenOfficeRPG/

What I've already checked:
• All repos are set to Deploy from a branch, main branch, root folder
• All index.html files are intact and untouched
• No commits or changes were made in the hours before the 404s started
• Last commit timestamps on affected repos are 8–48 hours ago
• GitHub Pages is enabled on all affected repos

The fact that every single repo went down at the same time, with no action on my part, suggests this is account-level or infrastructure-related rather than a configuration issue.

Has anyone else experienced this recently? Any suggestions on how to get this resolved would be greatly appreciated.

Username: SamirSaad786
Account type: Free

[SamirSaad786]

I renamed my user Pages repository from SamirSaad786.github.io to samirsaad786.github.io (lowercase) to match my username casing. The rename completed successfully, Pages is enabled, source is set to main branch at root, the repo is public, and deployments are showing as green and successful. However https://samirsaad786.github.io/ still returns GitHub's own 404 page — "There isn't a GitHub Pages site here."

I've verified: index.html exists at the repo root, no custom domain conflicts, Pages toggle has been cycled off and back on, multiple fresh commits made. The issue persists in incognito browsers ruling out local cache.

This appears to be a CDN propagation issue on GitHub's end following the rename. Could you please flush the cache or manually re-register the Pages domain for this repo?

Repo: https://github.com/samirsaad786/samirsaad786.github.io

[SamirSaad786]

I just discovered that my GitHub account has been flagged. When attempting to authorize Netlify via 'Sign in with GitHub,' I received the message 'This account is flagged and therefore cannot authorize a third party application.' This appears to be the cause of all 14 of my GitHub Pages repos returning 404 errors simultaneously. I have not received any email notification about this flag or any explanation for why it was applied. Please review my account, explain what triggered the flag, and advise on how to resolve it

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[paulagitty]

I just got flagged also because I change my username. and Open many website in the 2 3 days, so what should I do now? Username : paulagitty

[itxashancode]

Check your GitHub account storage usage. Free accounts have a 1 GB total storage limit across all repositories. If you've exceeded it, GitHub Pages builds stop and sites return 404s. Go to Settings > Billing & plans > Storage to see your usage.

Also verify no single repository file exceeds 100 MB, which breaks Pages builds. Look for large assets (images, videos, datasets) in any repo.

If storage is the issue, reduce repo sizes by removing large files with git filter-repo or the BFG tool, then force-push. Alternatively, upgrade to a paid plan.

If storage looks fine, check the GitHub Status page for any ongoing Pages or storage incidents. A platform-wide issue could explain the simultaneous failures.

I'm not 100% sure, but this pattern matches past storage-limit-related Pages outages. Did you recently add large files to any of these repos?

[SamirSaad786]

Thank you! I have the issue resolved now :)