We're aware that, after a recent major change to Bulk Order Books, there are some remaining Bulk Order Books that may present issues with opening or getting fixed by the Item Fixer NPC. We're actively working on this and hope to have a solution quickly. The good news is we don't expect any issues with the remaining orders in the books, so anything you've stored in them should be preserved even if the book cannot be opened. Thanks for your patience while we look into this and work to resolve it