Symfony\Component\Routing\Exception\InvalidParameterException

Problem/Motivation

I have just migrated the website from D8.9.13 to D9.1.6.
Everything works fine, except adding a link into a CKEditor field. The window doesnt load and I get this error :

Symfony\Component\Routing\Exception\InvalidParameterException : Parameter "linkit_profile_id" for route "linkit.autocomplete" must match "[^/]++" ("" given) to generate a corresponding URL. dans Drupal\Core\Routing\UrlGenerator->doGenerate() (ligne 204 de /var/www/tagbzh-dev/web/core/lib/Drupal/Core/Routing/UrlGenerator.php).

Same with Linkit 6.0.0-beta2.

In Text formats and editor (admin/config/content/formats/manage/xxx), an error displays (see print screen attached).

Thanks for any help.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes