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Decentralized Matrix messaging network says it now has 115M users
(www.bleepingcomputer.com)
This is a most excellent place for technology news and articles.
I tried the app but it doesn't even have a way to register an account. Nor any directions in doing so. I went to matrix.org, nothing there either. I had to Google it. Which led me to app.element.io. So I tried to register and it failed. I'll give it another year to develop and see how things are going.
That sounds like you tried Element X app, which is beta (it says so everywhere). One should still be using the Element app for now.