open_mapping is not work

[Napoleon-Jm]

My settings:

return {
  'akinsho/toggleterm.nvim',
	version = '*',
	opts = {
      open_mapping = [[<C-j]],
      -- hide_number = true,
      start_in_insert = true,
      direction = 'float', -- vertical | float | tab
	}
}

When I type ctrl and , nothing happened, changed to [[<C-j]], is not work nether.

But when I use command :Toggleterm it's worked(show the terminal).

Is there a way to debug or show some extra log?

However the follows map is worked for me:

nnoremap <leader>t :ToggleTerm<CR>
tnoremap <leader>t <C-\><C-n>:ToggleTerm<CR>

but when toggled to close, and open again, the terminal is not in insert mode...

[akinsho]

@Napoleon-Jm you've written out the mapping character incorrectly it should be <C-j> I think your issue is likely a config/personal setup issue rather the an a plugin issue. Unfortunately I generally can't get into usage and bug detecting in your config so unfortunately I'll have to leave this to you to debug further