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Getting the image URL from a field_image on a node and view without any error.

Following error is get URI in view

 if (!$spec_paragraph_result->get('field_og_image')->isEmpty()) {   
           $uri = $spec_paragraph_result->get('field_og_image')->entity->getFileUri();  
           $paragraph[$title]['image'] = file_create_url($uri);  
         }  
         else {  
           $paragraph[$title]['image'] = "";  
         }  

following code show on using node URI in the node for the show in twig file please check following code.

 function budfactory_preprocess_node(&$variables) {  
   $node = $variables['node'];  
   $node_type=$variables['node']->getType();  
   if (($node_type == 'artist_line_up') && (!$node->field_page_back_ground_image->isEmpty()))  
   {  
    $_SESSION['bg_image'] = file_create_url($node->field_page_back_ground_image->entity->getFileUri());  
   }  
   else{  
     $_SESSION['bg_image'] = file_create_url("");  
   }  
 }