Crashes after preview cursor movement

My config:
require('fold-preview').setup({ auto = 400 })
When I put the cursor over the preview works fine, then, when I try to move the cursor the next error throws:

![image](https://github.com/anuvyklack/fold-preview.nvim/assets/852446/528697a2-348f-4636-86d4-73dbd6089ec4)
