MineCraft Can't connect to the MarketPlace on Samsung Galaxy A51

When i open the Marketplace it will load endless and it says:
'Can't connect to the market place. Maybe check your internet connection.'
I have a good connection, so thats really weird. I tried it on two Galaxy A51's and it don't works on both devices. I tried also on Nintendo Switch but that works fine.
No content loads. Nothing. Just a empty screen. With the text:
'Can't connect to the market place. Maybe check your internet connection.'
Sometimes it opens up something but it works bad then.

Hope you can help me!