https://gitlab.synchro.net/main/sbbs/-/issues/1111#note_8843
So, the root cause here appears to be that you can't import a certificate without a subjectName DN. TLS since 2017 has not, by itself, required a DN and Let's Encrypt, when creating the short-lived for https certs, does not include one.
The TLS cert for Synchronet is used by a fairly large number of "things" though, some of which may actually require a DN... a full audit needs to be done before blindly chopping that requirement out of Cryptlib.
--- SBBSecho 3.37-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)