If you are passionate about finding "Camp with Mom" or a similar game, use safe platforms like Itch.io, search properly, and consider supporting the creator. The "free download" from a shady .top site is never worth the risk of losing your personal data, email accounts, or even your financial information.
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.