File not included in module tree

[foodornt]

Using neovim, with the nvim-lspconfig plugin and loading the rust analyzer server like this:
lua require'lspconfig'.rust_analyzer.setup{on_attach=require'completion'.on_attach}
Gives me an warning whenever I open any file:
file not included in module tree
And I basically cannot use any of the lsp /features such as hovering and auto completion, any idea?

btw same thing with coc-rls

[foodornt]

nvm, duplicate of #443