FreeBSD wget cannot verify certificate, issued by Let’s EncryptnixCraft

I installed GNU wget utility on FreeBSD as explained here. However, whenever I use the wget command to download stuff from the Internet, it says:
   ERROR: cannot verify download.freebsd.org's certificate, issued by 'CN=Let\'s Encrypt Authority X3,O=Let\'s Encrypt,C=US':
    Unable to locally verify the issuer's authority.
How do I fix this problem on FreeBSD 12?

The post FreeBSD wget cannot verify certificate, issued by Let’s Encrypt appeared first on nixCraft.