I wasn't able to delete the post, which is why this is still there.
The issue was that the Android App got updated to v16.0.1 but our server is v15.5 SP6.
So the App wasnt working and I wanted to know what can be done as the app I downloaded from Playstore is the latest version.
I found out that there is a legacy App in Playstore that is compatible with v15.5, so we have installed the same and everything is fine now.