WebPはある時期だけサポートされてたよね
Remove WebP support by angristan · Pull Request #11589 · tootsuite/mastodon · GitHub https://github.com/tootsuite/mastodon/pull/11589
github.comRemove WebP support by angristan · Pull Request #11589 · tootsuite/mastodonAdd discussed in #11536, webp support is not stable (i.e. webp does not work at all), even when adding missing dependencies (#11538).
Paperclip/ImageMagick don't handle webp well, which results...