While learning more about the Title Block Plug in style (read this as fighting with it), I tried adding a new drawing border to a brand new file. No such luck as the Tool set palette location showed the red X in place of the normal icon & an ominous message popped up. I've restarted both my MacBook Pro (High Sierra) & Vectorworks 2018/SP1.
Anyone else had this happen? I've submitted a request to the Tech Support group, but haven't heard back yet today.