Security Error: PDF files must be hosted on the same domain as this site.

PDF is hosted on: http://https%3A%2F%2Fwww.novagreen.gr%2Fwp-content%2Fuploads%2F2019%2F04%2FNovagreen-A.E.-%CE%95%CE%B3%CF%87%CE%B5%CE%B9%CF%81%CE%AF%CE%B4%CE%B9%CE%BF-%CE%A7%CF%81%CE%AE%CF%83%CE%B7%CF%82-B2B.pdf but this site is: https://www.novagreen.gr