On 8. Jan 2023, at 13:01, Eli Zaretskii <eliz@gnu.org> wrote:

Date: Sat, 7 Jan 2023 23:11:15 +0100
From: Miguel Rodriguez <rodmigantonio@gmail.com>

Dear Maintainers,

Get a void-variable string-width error when typing C-x b. Error message

is pasted below.  Have reinstalled emacs.  Using Macos 10.15.7.

I cannot reproduce this.

The backtrace indicates that you invoked something called
'consult-buffer', not "C-x b".  What is this 'consult-buffer'?