The number one reason why people can’t move their cards is that the option “Disable moving cards” is checked.
Go to your board’s setting and verify if this option is checked. If yes uncheck it to be able to move your cards again.
Note: This feature “Disable moving cards” is only available for the owner of the board.
If the “Disable moving cards” is not checked and you can´t move your cards, contact our Customer Support.