distill migrated to manifest version 3 starting from 3.10.* releases. there was a bug in version 3.10.2 that resulted in the 404 - error as shown in your screenshot. version 3.10.3 fixed that. we are unable to reproduce that in the latest version.
can you please follow instructions in Chrome extension - Watchlist not loading - #9 by ajitk and share what you find out?