larastan: [0.5.8] Class self was not found while trying to analyse it - autoloading is probably not configured properly.

• Larastan Version: 0.5.8
• --level used: 8

Description

In a model that calls self::, Larastan/phpstan crashes:

  Line   xxx/Translation.php                                                            
 ------ -------------------------------------------------------------------------------------------------------- 
         Class self was not found while trying to analyse it - autoloading is probably not configured properly.  
         💡 Learn more at https://phpstan.org/user-guide/autoloading  

This used to work fine in the version we used before we updated, version v0.5.0.

Laravel code where the issue was found

    public static function getGroupsByNamespace()
    {
        $groupsByNamespace = self
            ::select('group', 'namespace')
            ->orderBy('namespace')
            ->orderBy('group')
            ->distinct()
            ->get()
            ->groupBy('namespace');

        return $groupsByNamespace;
    }

It also happens with a method that uses a scope, like so:

    public function scopeForContext(Builder $query, string $locale, string $namespace, string $group)
    {
        $query->where('locale', $locale)
            ->where('namespace', $namespace)
            ->where('group', $group);
    }

    public static function getGroupTranslations($locale, $group, $namespace)
    {
        return self::forContext($locale, $namespace, $group)
            ->orderBy('name', 'asc')
            ->get();
    }