The Signal Server repository hasn’t been updated since April 2020. There are a bunch of links about this here but I found this thread the most interesting.
To me, this is unforgivable behaviour. Signal always positioned themselves as “open source”, and the Server itself is under the best license for server software (AGPLv3 – which raises questions about the legality of this situation).
Signal’s whole approach to open source has constantly been underwhelming to say the least. Their budget-Apple attitude (secrecy, i.e. “we can never engage the community directly”, “we will never merge/accept PRs”, etc) has lead to its logical conclusion here, I guess. I have been somewhat of a “Signal apologist” thus far (I almost always defend them & I think a lot of criticism they get it very unfair) but yeah I’m over Signal now.
I recommend Delta Chat, it doesn’t needs to create an account since it is just an email client with a chat interface, it is not a replacement for your fancy chat app but for your email app, everyone have email, so will need an email app anyway, it makes email easy to use and encrypted out of the box without your friends having to know what encryption means.
I like XMPP but UI/UX is really poor, it is surprising that this email client has a much better UI/UX than Conversations, it has swipe to reply, etc. I found Conversations ridiculously “hard” to use, blabber.im improves a lot of small details that have an impact in the users every day workflow
https://delta.chat