Coconut Battery Plus is a software tool that provides detailed information about your Mac's battery health. If you're looking for a cracked version of the software, I need to advise you that using pirated or cracked software can pose security risks and may not provide the same level of functionality or support as the official version.
Your Activation Key is invalid
There are a couple reasons why this might have happened:
1) you don’t have an activation key and entered a fake one
2) you entered the wrong code
3.) You didn't sign up properly
Please double-check that you have downloaded your activation key according to the instructions in the tutorial video.