User brought this up to me today, and two of us have been testing and looking around online for help on this.
We attempt to use the Product requirements template, and even when just giving it a title and hitting publish or close, the page will not allow us to save or publish it.
I found one workaround for a bug for it before, https://jira.atlassian.com/browse/CONFCLOUD-69875
But this workaround doesn't resolve our issue either.