Update

nginx/default.conf

@@ -2,7 +2,8 @@ server {
     listen 80;
     index index.php index.html;
     server_name siska.appstaging.my.id;
-
+    
+    # Ensure this matches your actual document root
     root /var/www/public;
 
     location / {
@@ -12,12 +13,12 @@ server {
     location ~ \.php$ {
         fastcgi_pass sistem-akademik-dev:9000;
         fastcgi_index index.php;
-        include fastcgi_params;
-        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_param SCRIPT_FILENAME $realpath_root$fastcgi_script_name;
         fastcgi_param PATH_INFO $fastcgi_path_info;
+        include fastcgi_params;
     }
 
     location ~ /\.ht {
         deny all;
     }
-}
+}