You should checked all reasons from here
- There’s no document to be found at the URL you provided. Make sure you provide the correct URL.
Try to open file from browser.
Make sure you don't try to send on preview service path of the file from your local host. To which, obviously, there is no access from the Internet.
Path to file must be http:// or https://
If path to your file start with https:// make sure your site have necessary secure certificate.
Domain name matters.
Will not be open in preview service
http://185.231.70.200/vacuumcleanerprocedure.doc
Will be open in preview service
http://domainname.com/vacuumcleanerprocedure.doc
- The document is too large. Word and PowerPoint documents must be less than 10 megabytes; Excel must be less than five megabytes.
Try different files with different Microsoft file types.
- The document was not saved in a format that is supported for opening in a web browser. Try saving your document in one of the following
formats: Word: docx, dotx Excel: xlsx, xlsb, xls, xlsm PowerPoint:
pptx, ppsx, ppt, pps, potx, ppsm
Try different files with different Microsoft file types.
- You need to sign in or provide a password to open the document. Make the document publicly available to view.
File permission and folders mode should be 775
.
Check if in .htaccess
file of your apache server there are allow access to ms-office files.
Check if your file available from internet. Try to open file from browser. If you see “You don't have permission to access filename on this server” see answer here
- The document’s file name contains invalid characters. Try encoding the file name when you type the document’s URL, or rename the file to
use only letters and numbers. For example, to encode a URL that
includes an ampersand (&), you would type %26 for the ampersand
character. For more information about URL encoding, also known as
percent encoding, see Percent-encoding on Wikipedia.
The value after "src=" should be URL-encoded. When you place the link on the preview service, it already encodes it for preview. Additionally, I may encode the link here, but the result will be the same.