How do I get which-key.nvim to trigger it's popup manually?

Plugins
1

My current setup blocks all use of the popup and I don’t know why.
This is my setup.

~/.config/nvim/rocks.toml

[plugins]
"rocks.nvim" = "2.42.2"
"which-key.nvim" = "3.13.3"
...

/home/bas/.config/nvim/plugin/keymanual/init.lua

local config = {
  triggers = {
    {"<leader>", mode = "n" },
  },
}

require('which-key').setup(config)