What do we know about this flight so far?
It had a 103 ton payload.
It took off(ish) from a 2700m(ish) runway.
It was flying to Spain.
It had a tail strike or two close to the end of the runway.
What can we speculate?
It wasn't very heavy(unless it was tankering fuel).
It had experienced crew.
It had a problem of some sort.
The problem was probably one of these,
Incorrect loading.
Aircraft malfunction (engine, airframe).
Pilot error (incorrect or no flap (config warning!?!), incorrect bug speeds(unlikely to make a difference on this length runway)).
Who knows, we can all speculate.
cheers
zzz