There are no bugs, understand that this is Aion Classic, and that you must buy skills on Npc or
enable auto learn skill in ...\AionServerPlay\AionGameServer\config\main\membership.properties
Change it...
# Enable skill auto learn mode
# Default: 10
gameserver.autolearn.skill = 10
To this...
# Enable skill auto learn mode
# Default: 10
gameserver.autolearn.skill = 0
Oh right, thank you so much, my bad sorry.