Troubleshooting installation # Troubleshooting installation on Ubuntu # Expired Let’s Encrypt root certificate # If you see errors like “Certificate verification failed” or “gpg: no valid OpenPGP data found” when installing Themis Core on Ubuntu, make sure that OS uses the latest Let’s Encrypt root certificate. $ sed -i 's|mozilla/DST_Root_CA_X3.crt|!mozilla/DST_Root_CA_X3.crt|' /etc/ca-certificates.conf $ update-ca-certificates
