JR East is rushing to recover due to a problem that it cannot be charged on the night of the 7th with some functions of JR East's service "Mobile Suica" that allows you to pay fares using a smartphone.
According to JR East, the system failure is caused by the function of the "Mobile Suica" application such as Apple's smartphone "iPhone", and it is possible to charge the specified amount online from around 7 pm on the 7th. It means that it is gone.
JR East is rushing to recover and investigating the cause, as there are a series of inquiries about payment of fares and the inability to use it at restaurants.
On the other hand, it means that you can charge with cash at the station's dedicated machine.