I tried to remove slider-entity-row and custom-sonos-card but I’m still seeing the 404 error in developer tools. All related JS files have indeed been deleted but the the two cards are still showing in hacs.repositories, lovelace_resources and default.repositories folder. I don’t seem to have access to these files to manually remove the entries. HA is running in Docker on Synology.
How can I make sure both are completely removed?
See developer print screen. 