When I attempt to open a document on a Government of Alberta website I get the following response:
Please wait... If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document. You can upgrade to the latest version of Adobe Reader for Windows®, Mac, or Linux® by visiting http://www.adobe.com/go/reader_download. For more assistance with Adobe Reader visit http://www.adobe.com/go/acrreader.
I have checked and confirmed that the program is up to date
This is generally caused by using a browser that is not compatible with the Adobe Reader plug-in. A browser that uses it's own pdf viewer. This is the message you will get when you try and open a pdf form in one of those browsers. Like mentioned above, either try a different browser or you can right-click the link to the pdf file, save it to your computer then open Reader itself and use File>Open to open the pdf.