I've noticed an issue with version 1.24 of Start11 regarding pinning items to the menu.  I'm using Windows 10 Pro build 19041.

If I perform a search and select "Pin to Start Menu (Start11)" from the context menu of one of the items, the item does not get pinned.  However, if I navigate the All Programs menu to find the item and attempt to pin it, it works as expected.

I have Start11 configured to use the classic search results format.  It works as expected when using the new search results format, but I prefer the classic search results format.