How can I have more than five tabs?

I have six pages in my form.  I installed the tab widget, it is only doing 5 tabs.  How can I add more?

I have cloned your form to check the issue. I found that there is no Page Break for Payment page and hence causing the issue.

It seems that you have already figured it out and now I am able to see 6 tabs on your form. Please let us know if you need further assistance in this regard. We are happy to assist you.