Steps to replicate the issue (include links if applicable):
- enter https://commons.wikimedia.org/w/index.php?title=File:CSD_Berlin_2023_015.webm&action=revert&oldimage=20230816094959%21CSD_Berlin_2023_015.webm in webbrowser
- press button "revert"
What happens?:
Error page:
Request from XX.1XX.XX.XX via cp6009 cp6009, Varnish XID 67503684
Error: 503, Backend fetch failed at Fri, 18 Aug 2023 06:41:07 GMT
What should have happened instead?:
Revert should have been done.
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):
Happening for some days now.