I started with Rembrandt 3.1.8.1 and got the same error message. Some default pages were not added. Trying "Add default pages" seemed to reset my homepage. After trying different things, I activated both other themes, and then reactivated Rembrandt. I end up with many default pages. Some pages I add to Top menu, while others seem to work on the product pages (shipping and delivery, refund and returns show up under "shipping and payment" tab). Let me be clear, I think that's what resulted. Main issue for me was "Products" page doesn't seem to be added. I worked around this by adding a category "all products", all items are also listed under that category, changed the "Shop Now" link on the slider to the all products category url, and removed the Products link in the Top menu. "Shop Now" button goes to a page that says 'All Products". As for as the 3 images under slider, I just added the normal way and it was never an issue but I did this after all the other fixes I did. My biggest concern is that reviews are not added. The "Reviews" tab does not have the proper hashtag (ie #details, #shipping, #specifics) and reviews are not added or if they are they are not viewable. I found that on the two demonstration themes Rembrandt and Michelango, same issue. DaVinci seems to be ok. If this is related to "Add Default Pages" issue I don't know. Anyone have input? Anybody? Wish you well. -john