Based on a recent update to our security policies, we've restricted the ability of new free accounts to deliver PDFs and Archive files like `zip` or `rar`. It's possible to upload and manage those files, and it's possible to download them using our Media Library, but a restriction applies to delivering them publicly.
Trying to deliver such resources would result in an HTTP 404.
For PDFs that are uploaded as `resource_type: 'image'`, it's possible to use those PDFs with our transformations features, so you can convert the PDFs to another image format and deliver them that way.
In order to remove the restriction, please log in to your Cloudinary account, go to your account's Security settings page and under 'PDF and ZIP files delivery', check the 'Allow delivery of PDF and ZIP files' flag, press 'Save' and accept the team of service.