The SSL-Problem sounds like a real show-stopper.
“SSL” basically refers to encryption of data that is transmitted between an app and the corresponding servers. There are different versions and older ones at some point become obsolete because either someone found a way to break the encryption or new hardware becomes so fast that the encryption cannot withstand an attack.
And in addition there are so-called “root certificates” in the operating system that are mandatory for this encryption but which have an expiry date.
So what might have happened is that either the server no longer allows old versions of “SSL” or that the relevant root certificate on Android 4.4.4 has expired.
Those would typically get updated with the OS but there are no OS updates for the FP1 anymore.
There are some older topics about SSL that are somewhat similar
Not sure if that makes it a hopeless situation but if it can be fixed it won’t be too end-user-friendly.