I can login with nsec.app and get this list. After selecting "mute all" it seems to process correctly and ends with "done, try again". When opening Amethyst first time it did show the bots still, nothing added in blocklist. 
This can be because me with nsec.app and Amethyst didn't do everything right

 https://image.nostr.build/733f2400eb25d0f3ef415b60b98c7d399557dd973ce9e27342adec0b66f2f15f.jpg