Ecrapince

Hello everyone. I'm in Sinnoh since yesterday but I have a problem. When I speak to the galactic member in front of the tower in Valley windworks it says me "you are not allowed to enter the valley windworks" and the conversation stop here. When I watch videos people normaly have a fight against this guy and I tried to speak to everyone in every cities. I tried to reload many times too... Could someone help me please ?