For some days now, in the admin area you have had these errors:
Uncaught SyntaxError: expected expression, got '<'.
on files moxie.min.js, plupload.min.js, wp-plupload.min.js
This does not allow us to upload images to media galleries, pages, articles...
When entering in Media Gallery we have this error: Uncaught TypeError: wp.Uploader is undefined on media-grid.min.js; and no images!
If I try to upload an image from a page or post, we have the same above error but on the file media-views.min.js.
The front-end has no errors.
Some "online solutions" have already been tried, as well as updating everything, restoring a backup, installing worpdress again via ftp...
The problem remains!
I don't know how it happened, the owner of the site didn't make any operation.
Any idea?
Thanks!
Resolved! It was an older redirection. This redirection took all the urls with the term 'upload', so also the js plupload.min.js and consequently all the others (moxie.min.js...).