Unable to use luci ttyd "plugin"

Installing and Using OpenWrt
1

I am trying to use the luci ttyd option under services/terminal in a snapshot build for a NanoPi R5S. When I try and access the terminal in a web browser at https://192.168.1.1/cgi-bin/luci/admin/services/ttyd I get an "Unable to connect" error in the terminal frame. I have the luci web interface configured to use ssl

# cat /etc/config/uhttpd 

config uhttpd 'main'
	list listen_http '0.0.0.0:80'
	list listen_http '[::]:80'
	list listen_https '0.0.0.0:443'
	list listen_https '[::]:443'
	option redirect_https '1'
	option home '/www'
	option rfc1918_filter '1'
	option max_requests '3'
	option max_connections '100'
	option cert '/etc/uhttpd.crt'
	option key '/etc/uhttpd.key'
	option cgi_prefix '/cgi-bin'
	list lua_prefix '/cgi-bin/luci=/usr/lib/lua/luci/sgi/uhttpd.lua'
	option script_timeout '60'
	option network_timeout '30'
	option http_keepalive '20'
	option tcp_keepalive '1'
	list ucode_prefix '/cgi-bin/luci=/usr/share/ucode/luci/uhttpd.uc'
	option ubus_prefix '/ubus'

config cert 'defaults'
	option days '397'
	option key_type 'ec'
	option bits '2048'
	option ec_curve 'P-256'
	option country 'ZZ'
	option state 'Somewhere'
	option location 'Unknown'
	option commonname 'OpenWrt'

and ttyd to use the same certificates


# cat /etc/config/ttyd

config ttyd
	option interface '@man'
	option command '/bin/login'
	option debug '7'
	option ssl '1'
	option ssl_cert '/etc/uhttpd.crt'
	option ssl_key '/etc/uhttpd.key'