https://gitlab.synchro.net/main/sbbs/-/issues/715#note_4825
Granted I have a brand new install, however, when attempting to use letsyncrypt, I noticed an error in the default values of the documentation. My true www root directory is "/sbbs/webv4/root" as shown in the server setup within scfg. All the documentation notes "/sbbs/web/root" and that directory does exist and is populated as well. I can only guess without going through the commits that there was an update that changed the primary directory. Once I changed the directorys in the letencrypt.ini, I went ahead and mirrored the .well-known/acme-challenge directories over to /sbbs/web4/root letsencrypt issued a certificate successfully.
--- SBBSecho 3.20-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)