Error when opening non-ascii filenames

[llyyr]

Error detected while processing /home/llyyr/.local/share/nvim/site/pack/packer/start/cmp-treesitter/after/plugin/cmp_treesitter.lua:
E5113: Error while calling lua chunk: /usr/share/nvim/runtime/lua/vim/uri.lua:43: attempt to call upvalue 'tohex' (a nil value)
stack traceback:
        /usr/share/nvim/runtime/lua/vim/uri.lua:43: in function </usr/share/nvim/runtime/lua/vim/uri.lua:42>
        [C]: in function 'uri_encode'
        /usr/share/nvim/runtime/lua/vim/uri.lua:67: in function 'uri_from_fname'
        ...r/start/cmp-treesitter/lua/cmp_treesitter/treesitter.lua:7: in function <...r/start/cmp-treesitter/lua/cmp_treesitter/treesitter.lua:5>
        [C]: in function 'require'
        .../packer/start/cmp-treesitter/lua/cmp_treesitter/init.lua:1: in main chunk
        [C]: in function 'require'
        ...ker/start/cmp-treesitter/after/plugin/cmp_treesitter.lua:1: in main chunk