Curl error 77 while installing RVM

OS: Ubuntu 20.04

While following RVM: Ruby Version Manager — Installing RVM to install RVM, got the following error:

curl: (77) error setting certificate verify locations:
CAfile: /etc/ssl/certs/ca-certificates.crt
CApath: /etc/ssl/certs

I tried a few ways around, but didn’t fix. Finally this one works for me.

$ sudo apt reinstall ca-certificates
$ sudo update-ca-certificates

The second command is important. I ran the first command first, but the problem didn’t fix, so I thought ca-certificates package was fine. Then I went with other posts which kind of wasting lots of time.

Then, finally, I realized I have to run the second command too.