I've had a careful look (as opposed to a man look) on the wishes list screen, and I can't see a method of adding a new one any more (ISTR it used to be a 'fly-in' button on the right-hand side).
I've gotten through to Jira direct, and there's a Create button, but that only allows for the support desk project, (USL?) not the wishes (UNP).
Please let us know when we can add wishes again.
Regards,
Iain