https://gitlab.synchro.net/main/sbbs/-/issues/650#note_4282
I got the same issue today rejoining cvs after an extended netsplit after, mysteriously, both cvs and vert ircd went tits-up.
Oct 5 14:28:38 bbs ircd[238899]: [eotlbbs.synchro.net<-cvs.synchro.net]: BURST 0
Oct 5 14:28:38 bbs ircd[238899]: [eotlbbs.synchro.net<-cvs.synchro.net]: GNOTICE :eotlbbs.synchro.net has processed topic burst (synched to network data).
Oct 5 14:28:38 bbs ircd[238899]: Routing: from cvs.synchro.net: eotlbbs.synchro.net has processed topic burst (synched to network data).
Oct 5 14:28:38 bbs ircd[238899]: [RAW->nelgin]: :eotlbbs.synchro.net NOTICE nelgin :*** Routing -- from cvs.synchro.net: eotlbbs.synchro.net has processed topic burst (synched to network data).
Oct 5 14:28:38 bbs ircd[238899]: [RAW->services.synchro.net]: :cvs.synchro.net GNOTICE :eotlbbs.synchro.net has processed topic burst (synched to network data).
Oct 5 14:28:38 bbs ircd[238899]: [RAW->sestar.synchro.net]: :cvs.synchro.net GNOTICE :eotlbbs.synchro.net has processed topic burst (synched to network data).
Oct 5 14:28:38 bbs ircd[238899]: [eotlbbs.synchro.net<-cvs.synchro.net]: :cvs.synchro.net MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->nelgin]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->cj]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->Keyop2]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->rampage]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->Dan_C]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->Nightfox]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->CrazyEddy]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->Kryten]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->Ree]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->wallacer_]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->krueger]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->services.synchro.net]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [cvs.synchro.net->sestar.synchro.net]: MODE #synchronet -o nelgin
Oct 5 14:28:38 bbs ircd[238899]: [eotlbbs.synchro.net<-cvs.synchro.net]: :cvs.synchro.net MODE 1696451444 #fidonet -n
Oct 5 14:28:38 bbs ircd[238899]: !JavaScript /sbbs/exec/load/ircd/server.js line 426: TypeError: origin.setusermode is not a function
Oct 5 14:28:59 bbs ircd[470087]: SynchronetIRCd-1.10 started.
--- SBBSecho 3.20-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)