Hello,
Thank you for you answer.
I have rechecked every point and everything seems fine but the mysterious empty file phenomena is still there.
– wordpress configuration: web site url and wordpress url are coherent and identical (no subfolder installation). The url is https://corli.huma-num.fr/ there is no www prefix.
– permalinks set to publication title
– files can be listed in the expected upload folder, they are not missing
– folder permissions: working files have same permission as non working files
– urls in the guid column of the posts table in database seem to be OK (I provide a csv dump of them)
– htaccess seems fine
I forgot to mention that WPML is installed; however, no lana download post has been translated.
I have sent you an email,
Thank you !