When you are did run sandbox status and popup image roll does not stop.
Edit file
admin/index.php and write this to top:
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
Open file
admin/controller/upgrade/upgrade.php to editor. Find line 11:
// $this->request->post['upgrade'] = 2200 ; // testing script
change to:
$this->request->post['upgrade'] = 3012 ; // testing script
( add this Oc version, where you try do upgrade )
and find line 143.
// $this->simulate = 1; // testing script
cha nge it to:
$this->simulate = 1; // testing script
Then go to admin page
index.php?route=upgrade/upgrade/addUpgrade&token= your token string this( You edit this string to your browser )