I get this error on the S6 when I run the installer app a second time. The first time it (nearly...) always works. After reboot DON'T run the installer app before the rSAP app, else it will not work. Did you already try that?
The SIM check seems to wreck something which a "normal" rSAP connection does not. With the S5 this also hapens, but a lot less frequently.
I don't think it is caused by the SIM card.