Hi Minizao and thnak you for your reply. In fact downgrading is not a "solution". We need to upgrade virtuemart for differents reasons and smartaddons should test their extensions to provide the best experience to their customers. I'm waiting for a solution since a few days, and the smartaddons's answer is: reinstall the extension correctly.

First of all, i bought the template to be able to use the quickstart package and free my time to put my boutique online as soon as possible. I opened aslo a ticket, and they told me once again to reinstall the extension. I thought i could get a good customer experience with Smartaddons by paying my template, but it seems that once we paid a template or extension, nobody cares about issues we could met...

Hello, admin
Can you help us?
Peoples can you solve this problem? anyone?

Hello,

All above modules has is a file in path : core\fields\sjvmcategories.php
So you need to simply change (near line 46 ):
if (!class_exists('VmModel')) {
if (defined('JPATH_VM_ADMINISTRATOR') && file_exists(JPATH_VM_ADMINISTRATOR . '/helpers/vmmodel.php')) {
require JPATH_VM_ADMINISTRATOR . '/helpers/vmmodel.php';
} else {
$this->error = 'Could not find VmModel helper';
return false;
}
}​
with below codes :
if (!class_exists('VmModel')) {
$vmpath_admin = $rootPath.'/administrator/components/com_virtuemart';
JLoader::register('VmModel', $vmpath_admin.'/helpers/vmmodel.php');
}
and find
protected function getCategories()
comment code
//VmConfig::loadJLang('com_virtuemart', true);
VmConfig::loadConfig();

Thanks

working all right in my end please advise where i am wrong .