With a nulled script, you are on your own. You cannot open a support ticket on CodeCanyon without a purchase code. You will be left sifting through sketchy forums, hoping someone else had the same problem and found a fix.
Nulled scripts are modified by third parties to bypass this activation screen. These cracked files are then uploaded to unauthorized repositories and forums. They are advertised as free alternatives to legitimate software. Why People Seek Nulled CodeCanyon Scripts
If you are looking to secure or scale your web development project, tell me about your goals. I can help you search for to popular scripts, suggest secure development frameworks , or outline a plan to clean a server if you have already interacted with infected code.