Roundcube just disappeared from my user interface

What type of hardware are you using: Old laptop or computer
What YunoHost version are you running: 12.0.11
What app is this about: roundcube

Describe your issue

Roundcube used to work well but now I cannot find it in my user interface
It is listed in the admin applications, but when clicking on open app I just get the start page of the user interface.
Typing in the link to webmail also directs towards the user interface.
I searched the forum but did not find tips.
Christian

Share relevant logs or error messages

no logs to add (or point me to what is needed)

Well, i just uninstalled and re-installed roundcube and now it works and also finds all old data.
Still, these things worry me.
Why does this happen?