SVG suddenly not showing in Media Library

Hi, my site is using your plugin to upload SVG files. It was working in both Media Library and web frontend. But all in a sudden, all svg files are gone in the media library. And the svg in the pages are also gone. I’ve checked the files, they do still exist in the wp-content folder but if I browse that file in the browser directly, it will goes to 404.

But the weird thing is, I’m using Simply Static Pro. And the site that it generates are able to see the svg files in the frontend. But this is till bothering me since it’s very inconvenient to manage existing svg files