Octet-Stream Error when viewing Web Pages

I am having a problem with Xara Web Designer (16-1-1-56358) web pages being viewed on-line in Firefox and Chrome (latest versions) due to an error message which is displayed upon entering the website and opening the home page.

Attachment 123729
https://i.imgur.com/Y21r47J.png

Both Standard Site and SuperSite exports do not work in Firefox/Chrome when viewed on-line, only Internet Explorer (Win 10/8.1/7) is successful.

The web pages display correctly locally when previewed within Xara Web Designer, using the Xara web browser and also with Internet Explorer, Firefox and Chrome.

Any assistance would be greatly appreciated.

Update:

Problem solved at the Magix Web Hosting Server. This is caused by the server sending the wrong mime/type for the document. Basically, a web page should be sent as "text/html". The server was instead sending it as "application/octet-stream", which is a type for a binary file. If you ever want to see the mime type for a document, right click the page and view the page info. Firefox will tell you the type.

Glad we could help Pendulum ;) Thanks for the update.