i installed ISPConfig 3 in a droplet debian 9
all work good unit of the dns when i added a domain name but
when i try to access to my domain i have this error ERRNAMERESOLUTION_FAILED
also with nslookup i have : ** server can't find leadprospector.co: SERVFAIL
this is my config : http://prntscr.com/glw1ak

thank you