E542: Unbalanced groups

[caenrique]

I have this error from time to time, and I can't figure out why

E5108: Error executing lua ...e/pack/packer/start/feline.nvim/lua/feline/generator.lua:517: E542: unbalanced groups
stack traceback:
        [C]: in function 'nvim_eval_statusline'
        ...e/pack/packer/start/feline.nvim/lua/feline/generator.lua:517: in function 'get_component_width'
        ...e/pack/packer/start/feline.nvim/lua/feline/generator.lua:609: in function <...e/pack/packer/start/feline.nvim/lua/feline/generator.lua:526>

Do you have any idea about the source of the problem??
my configs can be found here