Pefomance Calculator refuses to calculate.

[Supikoira95]

Hello. I had bit of an issue with the perfomance calculator not being able to give me perf data. It comes up with a message saying "Please complete fueling and loading before calculating take off perfomance" , As the message is very clear, I double check that my refueling, and boarding indeed IS completed... I gave it additional 15 minutes and it was still giving me this same message. This was the first time I used "realistic" boarding time option, and it took me about 23 minutes to board and 7 minutes refuel.  I have made few flights with this beautiful aircraft and this is first time I encountered this. Also this was my first time using realistic loading time, instead of instant or fast loading, which I have used before without any issues.