The Swashbuckler feat "Signature Deed" cannot be selected as it requires a choice that is currently filtered to DeedsHasGritCost on the character. Since Swashbuckler's abilities use Panache this results in literally nothing happening when attempting to add the feat. I have created a homebrew version of this feat changing DeedsHasGritCost to DeedsHasPanacheCost and it works correctly.
Relevant data file and line that needs to change:
Signature Deed is a gunslinger feat first, and then later became a Swashbuckler feat as well. Your change would break the Gunslingers. Add this to the end works: |PC[TYPE=DeedsHasGritCost]