A court in Rotterdam has declared the Dutch crypto platform Knaken bankrupt, after prosecutors said €7 million in customer funds had gone missing. The public prosecution service requested the bankruptcy in June and has opened a criminal investigation.

Knaken customers have been locked out of the trading platform and cannot reach their accounts or balances, the court said in its ruling. It found that the company has too little capital to repay customers in full.

Prosecutors estimate the platform has…