Would it be possible to add isset() checks to the filterFields() method in Post model?

public function filterFields($fields, $context = null)
    {
        $user = BackendAuth::getUser();

        if (!$user->hasAnyAccess(['radiantweb.problog.access_problog_can_publish'])) {
            if (isset($fields->published)) {
                $fields->published->hidden = true;
            }
            if (isset($fields->published_at)) {
                $fields->published_at->hidden = true;
            }
            if (isset($fields->user)) {
                $fields->user->hidden = true;
            }
        }
        else {
            if (isset($fields->published)) {
                $fields->published->hidden = false;
            }
            if (isset($fields->published_at)) {
                $fields->published_at->hidden = false;
            }
        }
    }

I am extending this model to add repeater fields to the blog content, but errors are appearing when repeater fields are added as the published and published_at dont exist.

I don't mind looking into it. But would you mind sharing a video or images of how your using repeater?