Most odd. I had no problem taking off yesterday (screenshots here), both from a cold-n-dark start and a second in-flight take-off after landing for Kristiansand. If my memory is right, I’d set the passenger load to 100% & left the fuel at 50% in the EFB prior to the initial take-off. I’ll do some more testing…
Edit:
OK, here’s video of a takeoff.
Winds at the takeoff site ( 5 knots):
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Seats are reduced from 100% (300 lbs per person!) and set to a more reasonable 57% (170 lbs per person):
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Cargo is reduced from 2% to 0%
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Fuel is doubled from the default and set to 100%
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Resultant MAC is 35%:
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Flaps and trim are set to 20% and 2.0:
Which results in this takeoff.
Granted, it was not the most graceful takeoff, but I am in a bit of a rush to post this as my two 
are asking to be fed. and need to go… well, you know 