Several of our users have downloaded the Mattermost client from the Google Play store and are now getting the message that the server is running an incompatible version.
The version on the market place shows v3.4 for the Mattermost client.
We are on Enterprise 3.3.0 which appears to be the most recent stable release.
the issue with the Android client not connecting is almost always the SSL certificate is missing the intermediary cert. Visit https://www.ssllabs.com/ssltest/index.html on your domain to test.
You’ll likely see an error about the missing chain/Certification Path… make sure you append the signed cert and the CA "middle"intermediate cert and this should resolve the issue.