I do the same to install as the readme say:

return {{ 'nvim-java/nvim-java' },config = function()require('java').setup()require('lspconfig').jdtls.setup({})end}

and

return {{ 'nvim-java/nvim-java' },}

but when I try javarunner run main and then any other command, it shows the following error

I don't know why doing java in neovim is such big problem. Note that I'm trying in the play java-nvim