Cannot access protected property CodeIgniter\HTTP\IncomingRequest::$uri

Just replace uri to getUri.

PHP Code:

      // $this->language->setLocale($this->session->lang); 
69        // Preload any models, libraries, etc, here.    
70 
71        // Determine whether to include the template or not
72            $excludedUrls = ['home','/','',NULL, 'about', 'login','register','users','/users/register','users/registerUser','registerUser','blog', 'contact'];
73 
74            // Get the request URI segment 1
75            $requestUri = $this->request->getUri()->getSegments(); // <<<<<<<
76            $this->includeTemplate = false;
77            foreach ($requestUri as $urisegment){
78