No, I have already unbinding Ctrl+I. It is also not helping.

On Wed, Aug 26, 2020, 7:24 PM Roman Perepelitsa <roman.perepelitsa@gmail.com> wrote:
On Wed, Aug 26, 2020 at 3:14 PM Ahmad Ismail <ismail783@gmail.com> wrote:
>
> I am trying to completely disable the zsh completion system.

Does this do what you want?

    bindkey -r '^I'

Roman.