errors when calling any goto-preview function

[vojtechj]

Hi,
can someone please help me with this?

Error executing vim.schedule lua callback: ...\pack\packer\start\goto-preview/lua/goto-preview/lib.lua:299: attempt to index field 'lsp_configs' (a nil value)
stack traceback:
...\pack\packer\start\goto-preview/lua/goto-preview/lib.lua:299: in function 'handle'
...\pack\packer\start\goto-preview/lua/goto-preview/lib.lua:333: in function 'handler'
C:\Program Files\Neovim\share\nvim\runtime/lua/vim/lsp.lua:1383: in function 'cb'
vim/_editor.lua:248: in function <vim/_editor.lua:247>

I get this error for example, when calling:
local gt = require('goto-preview')
vim.keymap.set("n", "gd", gt.goto_preview_definition, {})

thank you

[vojtechj]

I had to call :PackerSync and then it was working. Before that the M.conf was empty {}