Invalid purchase code shows sometimes due to unusual network IP, In this case you can wait some time or change your network and try again.
If the problem is encountered during installation, make sure you use your codecanyon.net account username as Username field. Ex. Ramomcoder (Email address cannot be used).
If you still face the same problem, create a new ticket and we will help you.
[ 3 Out of 4 Found Helpful ]
Submit a ticket and we’ll get back to you as soon as possible.