Android app "cannot authenticate to this server", desktop app OK

After entering as the sever name, the app displays the following warning,

Cannot authenticate to this server

The destop app on Windows connects fine though. What could be the problem?

Android client 1.4.1
Windows client 2.3.2

Hi @bob, depending on your server version you need at least 1.4.3 to be able to login which unfortunately is only available via Google Play at the moment :confused: