I made a lot of search in order to find a solution and the only one I found is to add the domain that hosts the script to the trusted websites in Kaspersky. Though, it is not the perfect solution if your script is used by a lot of customers who will not be comfortable when I ask them to tell their visitors to add their domains to the trusted list in order to get the progress bar work.
If you have Kaspersky you can see the probelm on these pages :
Any help to solve this issue would be much appreciated.
Thanks in advance.