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

PDF is hosted on: http://https%3A%2F%2Flanna.mbu.ac.th%2Fwp-content%2Fuploads%2F2019%2F06%2F%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A8-%E0%B8%8A%E0%B8%B3%E0%B8%A3%E0%B8%B0%E0%B8%84%E0%B9%88%E0%B8%B2%E0%B8%A3%E0%B8%B1%E0%B8%81%E0%B8%A9%E0%B8%B2%E0%B8%AA%E0%B8%96%E0%B8%B2%E0%B8%99%E0%B8%A0%E0%B8%B2%E0%B8%9E-1-%E0%B8%9B%E0%B8%B5-62.pdf but this site is: https://lanna.mbu.ac.th