A350 can import simbrif flight plans on OIS, but not on FMC 

Having same problem but only with A35K. Created a flight in simbrief from egll to fact, before the latest update it would say unable to find destination airport, since the update, after clearing cache after update etc etc it now brings the plan etc but pressing insert does nothing. Not having problems with the A359

Sounds similar to the issues I’m having here;

 

I can’t import the flight plan / load it in, and trying to enter the departure & arrival airports in the fms is 50/50 whether it works, or not.