For some time the worldspawn map database has a new URL http://ws.q3df.org. It used to be "q3a.ath.cx" but that is in the past now. That provider stopped forwarding the domain to our servers. That's why it now can only be accessed via http://ws.q3df.org.
Unfortunately that affects the auto download feature of dfengine and iodfe, too.
To continue downloading maps you have to change the dl_source cvar.
set it to "http://ws.q3df.org/getpk3bymapname.php/%m"