No email forwarders

[dave-boston]

I have created multiple accounts with a package that includes email accounts. On those account panels I can easily add email accounts but there is no add button for email forwarders.  In the top right it says "Mail Forwarders /
Available / Contracted NAN%".   Nan usually means some type of programming error as it means "non a number". 

Any ideas for a fix?

Thanks.