curl: (77) error setting certificate verify locations (Ubuntu 20.04.3 LTS)

I'm installing Waydroid on Ubuntu, when running:

export DISTRO="focal" && \
sudo curl -# --proto '=https' --tlsv1.2 -Sf https://repo.waydro.id/waydroid.gpg --output /usr/share/keyrings/waydroid.gpg && \
echo "deb [signed-by=/usr/share/keyrings/waydroid.gpg] https://repo.waydro.id/ $DISTRO main" > ~/waydroid.list && \
sudo mv ~/waydroid.list /etc/apt/sources.list.d/waydroid.list && \
sudo apt update

I get the error:

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

I'm running Ubuntu 20.04.3 LTS (Focal Fossa) and have fully updated the system.

ca-certificates is already the newest version (20210119~20.04.2).

I encountered the same problem and solved it like this:

$ sudo rm -f /etc/ssl/certs/ca-bundle.crt
$ sudo apt reinstall ca-certificates
$ sudo update-ca-certificates

Somehow the certificate authority chain file got messed up, I guess.

Credits: https://bobcares.com/blog/curl-error-77-problem-with-the-ssl-ca-cert/

I used to get this error when run composer update And I tried all the commands to reinstall the cert file, but the problem was not solved.

I realized that the error is due to permission So the problem was solved with this command

cd /etc/ssl

sudo chmod 755 -R certs/

From the look of the error, you may not have the ca-certificates package installed. You can resolve the issue via Terminal like this:

sudo apt install ca-certificates

Once installed, you should be able to run your cURL request properly