Quick summary

Users can't upload webp files in Studio. It looks like it doesn't work in https://playground.wordpress.net/, too.

Steps to reproduce

1. Download webp file from https://developers.google.com/speed/webp/gallery1
2. Create a site in Studio and open WP Admin
3. Navigate to Media -> Add New Media File
4. Drag the downloaded file to upload it

What you expected to happen

The file is uploaded.

What actually happened

Error is displauyed

Impact

Most (> 50%)

Available workarounds?

Yes, easy to implement

Platform

Mac Silicon

Logs or notes

No response