Bug when trying to save harpoon buffer

I was trying to save my harpoon buffer and then this happened.
![crop](https://github.com/gelguy/wilder.nvim/assets/84413141/e7ac697e-92fa-470a-bac1-583f515ce504)
![crop2](https://github.com/gelguy/wilder.nvim/assets/84413141/0c3a9e1b-e7dd-4b32-9a81-5480fcd3abb0)
Only happens with harpoon for some reason, it could be harpoons fault.