Module fails to create Report with Core 8.9.11

I had the same issue when I uninstalled drush.
I use Drupal 9.5.10 and I work to upgrade to D10.
The issue for me is resolved when i resinstalled drush using composer.
Also the Upgrade Status module was installed using composer.
Hope this helps.

Interesting about Drush. Upgrade Status has this among composer requirements:

"require": {
       // ...
        "webflo/drupal-finder": "^1.2",
       // ...
    },

So uninstalling Drush should not remove Drupal Finder. Theoretically.