Space export as html seems to be got broken

I'm "offloading" my public xwiki content from the https xwiki instance to a http accessible location with:

space=DevNotes;  
site="www.example.com"
curl "https://${site}/xwiki/bin/export/${space}/Page?format=html&pages=${space}%25" >${tmpFile}

It works for several years, but now only the resources are exported and the content pages are missing.