Wget problem on valid certificate

[Osiris]

@zend

oh, you mean one certificate is missing there?

Jup, the chain is missing the R3 signed by ISRG Root X1 intermediate.

@zend

I can do all by hands, but I can't install certbot into server - errors, old OS.

This is idealy something which should be handled by the actual system in place to get the certificate in the first place. I.e., ISP Manager.