Hello,
There is a setting in the EFB that turns rudder on tiller. If the issue is that the aircraft feels like it is skidding at higher speeds, we have noted this internally.
If you have issues where you can't access your INIT B page then you should go to PROG > FUEL PRED and enter the weight in there. The only reason why you wouldn't be able to do this is because your engines are running.
Hopefully this helps!