Step 1:

Copy all folders to your source main root.

Step 2:

Install Extensions/Modules/ Coupon Bar

Step 3:

If you get Permission denied when you click on ticket link of admin panel.

You need to change permission >>

Go to admin panel >> System Menu >>> Users >> User Groups >> Click Top Administrator (Edit link) >> in access permission click on select all and same with modify permission select all and then save it.

Step 4:

For Opencart 2 version : go to layout in admin panel click on extension -> module-> layout link edit template where you integrate the page

If Permission Denied >>  Follow Step 5:

If you get Permission denied when you click on ticket link of admin panel.

You need to change permission >>

Go to admin panel >> System  Menu  >>>  Users >> User Groups >>  Click Top Administrator (Edit link)  >> in access permission  click on select all  and same with modify permission select all and then save it.