Update: Yeah I had several reports about this banner message (though I never had it myself). As the JavaJens sources did not update I had to switch to LibreSignal as base.
This needed a few adaptions to allow upgrading easily from the existing JollaEdition without reinstalling.

But now its there 3.15.2 is available from here and already uploaded to harbour and in their verification process:
https://app.box.com/s/ihpxg57ij1yl6ne501hamof3m0i8cpqz

Enjoy.


PS: Also I will try convincing the LibreSignal people to integrate this SailfishOS/BlackBerry Patch for the Registration process to their sources.