I’m running into the same issue, the app tells me " You are using a legacy support release of the passwords app. The developers do not provide support for legacy support releases. Upgrade your server to use the regular version."
I checked the requiremens there - and I don’t see any point where my system is failing. I’m on 25, my server is using MariaDB, it is running under Linux (it is a Synology NAS), the server has got nearly 4GB RAM, it is more than enough disc space and “intl” is available as well.
The page was a bit outdated on PHP. PHP 8.1 is required as of this months release for the regular version. The LSR version supports PHP 7.4, 8.0 & 8.1.
I have the same issue, running version 25.0.3 Currently as I can’t upgrade to 25.0.4 due to this app not being able to update for some reason, but it is still complaining on the legacy support release. while I do match all criteria, PHP 8.1, MariaDB 10.5, EL9, HTTPS, All required PHP plugins, System running in CRON mode (not ajax or webcron). but still this message appears.
Downloaded the latest version again of the passwords app and installed it, still a no go.