Many states previously used the services of JPMorgan Chase to help administer their benefits programs. In particular Chase administered SNAP/Food Stamps EBT debit card programs for many states, as well as unemployment benefit cards and other services.
The Chase UCard Center located at https://ucard.chase.com/chp was the online hub you could use to check your balances and manage your card account.
However, Chase has gotten out of the business of administering EBT and similar debit card programs. So, if you are seeking the Chase UCard site and it is not working for you, the problem is not temporary. Instead, your card is no longer administered by Chase. You should contact the department within your state that previously worked with Chase in order to find out who your new card provider is.