Google-chrome – resource interpreted as document but transferred with mime type application/octet-stream pdf

The standard Media Type (formerly known as MIME types) is application/pdf. The assignment is defined in RFC 3778, The application/pdf Media Type, referenced from the Media Types registry.

Media Types are controlled by a standards body, The Internet Assigned Numbers Authority (IANA). This is the same organization that manages the root name servers and the IP address space.

The use of x-pdf predates the standardization of the Media Type for PDF. Media Types in the x- namespace are considered experimental, just as those in the vnd. namespace are considered vendor-specific. x-pdf might be used for compatibility with old software.

It means that the server is sending a Javascript HTTP response with

Content-Type: text/plain

You need to configure the server to send a JavaScript response with

Content-Type: application/javascript