Some times, Let's Encrypt limits are too low... Would like to have ZeroSSL as alternative with a switch in the DA GUI.
Report: I have to switch to zerossl as of too much clients reported an error with R3 not trusted (from letsencrypt). So for today we switched to zerossl.
Well, just got back to LE yesterday because ZeroSSL have some issues... forum.directadmin.com/threads/any-easy-way-to-use-zerossl-instead-of-lets-encrypt.63968/post-339584
I think your problem is related with not updated OS not with LE... I have that problem with macOS Catalina which doesn't work, and no problem on Monterey, with same certificate...
I would like to see BOTH Let's Encrypt AND ZeroSSL as choices in the DirectAdmin interface. This is especially useful in the case of wildcard certificates which are free in Let's Encrypt and must be purchased in ZeroSSL.
It's already there but not in GUI forum.directadmin.com/threads/windows-7-chrome-let%E2%80%99s-encrypt-problems.64652/post-336508