Core : fix install on user

install.php

@@ -347,6 +347,7 @@ function install_core($parameters,$custom){
 	$admin->name = 'Principal'; 
 	$admin->superadmin = 1; 
 	$admin->state = User::ACTIVE;
+	$admin->meta = json_encode($admin->meta);
 	$admin->save();
 
 	//create ufr