Social preview upload crashes and generated image returns 503 Error 54113

[K0nradG]

🏷️ Discussion Type

Bug

Body

I cannot set a social preview image for my public repositories.

Repository:
https://github.com/K0nradG/self-balancing-robot

Steps to reproduce:

1. Open repository Settings.
2. Go to Social preview.
3. Upload a valid PNG image.
4. Confirm the upload.

The upload creates a repository image URL, but the preview remains blank.
Opening the generated URL returns:

503 Max restarts limit reached
Error 54113

Example URL:
https://repository-images.githubusercontent.com/926787662/03be2cfc-bd73-4870-838f-50dcba8aef47

The browser console reports:

Uncaught TypeError: Cannot read properties of null (reading 'classList')
at upload-repository-image.ts:20

I reproduced this in Firefox, Microsoft Edge, and on a mobile phone.
The same problem also occurs with another repository.

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[SharadJ19]

+1, experiencing the exact same issue on a public repository.

The UI marks the upload as successful and sets the tags, but the asset fails to serve over the CDN and social scrapers render blank.
Repository: https://github.com/SharadJ19/chowkspot
Generated og:image URL: https://repository-images.githubusercontent.com/1319450558/d52754e4-858e-4b9f-9518-184340fdc8a2

Error Received:
XML
The requested content does not exist.
HttpStatusCode: 404
ErrorCode: WebContentNotFound
RequestId : 64cddeb0-501e-0064-6f6e-316669000000

Tested with compliant 1280×640 px sRGB PNG and JPG files across Chrome and Firefox (incognito). The backend storage blob is simply not being written/replicated upon upload.