There is only one single mastersite for this port and the problem is that it is only for the ftp protocol: ftp://ftp.invisible-island.net/ncurses/current/ Please add this more usable mastersite as protocol ftp has become somehow obsolete as the only alternative for downloads: https://invisible-mirror.net/archives/ncurses/current/
A commit references this bug: Author: swills Date: Sat Dec 8 16:58:49 UTC 2018 New revision: 486964 URL: https://svnweb.freebsd.org/changeset/ports/486964 Log: devel/ncurses: add https download mirror PR: 233855 Reported by: p5B2E9A8F@t-online.de Changes: head/devel/ncurses/Makefile
Committed, thanks!