Bro it shows error on setting before

[abrarishere]

      name = 'night-owl',
      colorscheme='night-owl',
      before = function()
        local night_owl = require('night-owl')
        night_owl.setup({
            bold = true,
            italics = false,
            underline = true,
            undercurl = true,
            transparent_background = true,
        })
        end

Error:

Themery config has some errors in their config:
  - Before in "night-owl" should be a text.

Check "help" and fix them.