Missing scrollbar resources in Office 2013 style

Hello,

when running the CodeJock Ribbon Sample, in release 16.3.1 (and also in 16.3.0), I get the following error / ASSERT in XTPScrollBarThemeResource.cpp:

Lines 67-74:
---
        CXTPResourceImage* pImageArrowGlyphs = NULL;
        if (!bLight)
        {
            pImageArrowGlyphs = LoadImage(_T("CONTROLGALLERYSCROLLARROWGLYPHSDARK"));
        }
        if (!pImageArrowGlyphs) pImageArrowGlyphs = LoadImage(_T("CONTROLGALLERYSCROLLARROWGLYPHS"));

        ASSERT(pImageArrowGlyphs);

---

This happens when the number of Recent File items in the Recent Backstage page becomes so large that a scrollbar needs to be drawn. The result is that no scrollbars are drawn, which makes this style, in combination with a Gallery Control, kind of useless. Can you please fix this?

Kind regards, Harm Bakker