When a spam filter is added or deleted, the options below that show "Action for filter matches:" automatically change to "Drop Email".
Where keeping "Send to spambox" should be my alternative.
Fixed in latest version of the skin. Thank you for the report!
Code:
cd /usr/local/directadmin/data/skins
mkdir evolution
cd evolution
wget -O evolution.tar.gz https://demo.directadmin.com/download/evolution.tar.gz
tar xvzf evolution.tar.gz
cd ..
chown -R diradmin:diradmin evolution