Quark adds slabs and walls for Dripstone, Tuff, and Calcite, and vertical variants of all vanilla slabs and most slabs added by the mod. However, Dripstone Vertical Slab, Tuff Vertical Slab, and Calcite Vertical Slab, do not seem to exist.

I don't think the log is important for this issue, but as the guidelines say to include it in every issue, here it is.

Looks like you just have them disabled somehow