It seems you need to register manually. I received the same messages and I contact sales team sales@opnsense.com . They did register manually and they said their automated order checking system is a bit picky at times.
This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.
Show posts Menu
#icap_access allow AUTH 127.0.0.1
acl localserver srvip 127.0.0.1
icap_access allow AUTH localserver