Arcane many problems

Hello dear support,
the Arcane topic does not work properly after the demo import. When you create a cup, it knocks out the match and forgets the others. Then there is an error with the date being set to Janaur 2001. And as admin of the cup you don’t see the tournament tree. The bracket is also bent and does not show all players. Need help unconditionally, otherwise it will not work properly. And my question is why does it work that the users can not enter the score in cups?