I have not paid Apple yet to recognize me. So your Mac might be saying that I am an unrecognized developer. I may not be recognized by Apple but I can promise you that this will not harm your Mac in any way.
Please allow it to get installed through your Security and Privacy settings.
You can learn more about this through the following links.
1.
https://support.apple.com/en-in/HT202491
2.
https://www.wikihow.com/Install-Software-from-Unsigned-Developers-on-a-Mac
If your download did not start automatically please click
here.