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%2F2021%2F06%2F%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B8%81%E0%B8%B2%E0%B8%A8%E0%B8%A7%E0%B8%B4%E0%B8%97%E0%B8%A2%E0%B8%B2%E0%B8%A5%E0%B8%B1%E0%B8%A2%E0%B8%AA%E0%B8%87%E0%B8%86%E0%B9%8C%E0%B8%99%E0%B8%84%E0%B8%A3%E0%B8%99%E0%B9%88%E0%B8%B2%E0%B8%99-%E0%B9%82%E0%B8%84%E0%B8%A7%E0%B8%B4%E0%B8%94-%E0%B8%89%E0%B8%9A%E0%B8%B1%E0%B8%9A%E0%B8%97%E0%B8%B5%E0%B9%88-4.pdf but this site is: https://nan.mcu.ac.th