Call to a member function has() on null

[Kendall Arneaud]

I am using both the modules and themes(v5.2.0 & v6.1.0 ) packages with Laravel 5.8.* on PHP 7.1
I have the modules in app/Modules while themes are in public/themes

my providers are registered/ discovered and in a middleware i have the following

if (!auth()->user()->hasRole("admin")) {
            Theme::set('angostura');
         }

when i try to visit a route with the middleware I encounter

Call to a member function has() on null

which points to

protected function resolveTheme($theme)
    {    
        $theme  = $this->where('slug', $theme)->first();
        $parent = null;
        if ($theme->has('parent')) {
            $parent = $this->where('slug', $theme->get('parent'))->first();
        }

which seems to return $theme as null even though the theme is active

any idea what is causing this?

[Taufiq Abdullah]

i get the same issue with laravel 5.8 php 7.2, can you share how you solve this problem ?

edit :

running composer update to fixed it