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

PDF is hosted on: http://http%3A%2F%2Fwww.nan.mcu.ac.th%2Fmcunan%2Fwp-content%2Fuploads%2F2020%2F07%2F%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A8%E0%B8%AB%E0%B8%A2%E0%B8%B8%E0%B8%94%E0%B9%80%E0%B8%A3%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B9%81%E0%B8%A5%E0%B8%B0%E0%B9%80%E0%B8%A3%E0%B8%B5%E0%B8%A2%E0%B8%99%E0%B8%8A%E0%B8%94%E0%B9%80%E0%B8%8A%E0%B8%A2-%E0%B9%91.%E0%B9%96%E0%B9%93.pdf but this site is: https://nan.mcu.ac.th