Magento Porto theme showing Purchase code is not valid!

Hi,
I have purchase Porto theme for magneto 2, I have all the files purchase code. But when I am trying to add the purchase code I got “Purchase code is not valid!” I tried 2-3 times but again the same error.
Can you please fix this issue ?

Thanks

Hi

Please contact Item Author to get support How to Contact your purchased Item Author and let them know about purchase code issues. Item author will be happy to assist you.

Thanks