This PDF file can't be opened with Adobe Acrobat Reader

@alberto_5542 Many government agencies or companies create a PDF. And Adobe has a security feature called Protected Mode at Startup (or Enhanced Security) that can block files it deems suspicious. Yeah, it was created by a government or a business, but sometimes, if the PDF was generated by an unknown third-party tool or came from an unusual source, Acrobat Reader's enhanced security might be preventing it from loading.