i had similar problem months ago. The dhcpcd used in the minimal ISO is missing key flags in the config file causing it to not able to auto-fetch DNS (or however its called. you can manually set your dns in /etc/resolv.conf or just use the JWM iso which is using connmand instead of dhcpcd by default
reference:
https://forum.obarun.org/viewtopic.php?id=1648