Error while using it in nvim

[wxguy]

Installed nvim theme as per install instruction. I get following error while opening the nvim editor:-

Error in /home/sundar/.config/nvim/init.lua:
E5113: Lua chunk: vim/_core/editor.lua:0: /home/sundar/.config/nvim/init.lua..nvim_exec2() called at /home/sundar/.config/nvim/init.lua:0[1]../home/sundar/.config/nvim/colors/adwaita-a
moled.vim, line 264: Vim(highlight):E413: Too many arguments: ":highlight link @string.regex       guifg=#44ddff guibg=NONE gui=NONE"
stack traceback:
        [C]: in function 'nvim_exec2'
        vim/_core/editor.lua: in function 'cmd'
        /home/sundar/.config/nvim/init.lua:4: in main chunk