Hello.
This issue already mentioned here (#81), but closed without any fix.
if we set navigation property to 1 or 2 then error raised because this.header (or this.footer) is null.
I replace this (and similar) lines:
headerActions = this.header.find(selector),
footerActions = this.footer.find(selector);
with
headerActions = this.header ? this.header.find(selector) : [],
footerActions = this.footer ? this.footer.find(selector) : [];
and its work!