Renew SSL certificate in XAMPP for Mac OS

Recently the Apache web server of the XAMPP package started to give me an error when accessing with the https protocol (before it also gave me an error, but it let me access indicating that it was not safe, now I can not access it in any way). I have seen the certificate of the page and it is the one that came by default from apache, which has expired since 2010 (I say that before, despite being outdated, if I let access). I tried to reinstall it, but it's still the same. I need to know if there is any other way to solve it or you can only renew the certificate. In case you find that renew the certificate what would be the steps to renew it in XAMPP. I use the MacOS High Sierra 10.13.4 operating system and the XAMPP version 7.2.3. I do not want the answer for Windows I am not very expert in the subject, so if it could be as simple as possible it would be liked.

Error accessing the page

Digital certificate

Thanks in advance.