You most likely are missing the ISRG Root X1
from the system CA root store.
For Ubuntu 16, this explains how to update that. It has helped others with this Ubuntu version
If that does not work, let us know and we can proceed gathering more info
You most likely are missing the ISRG Root X1
from the system CA root store.
For Ubuntu 16, this explains how to update that. It has helped others with this Ubuntu version
If that does not work, let us know and we can proceed gathering more info