Can not replenish my account

All of a sudden when I go to make a payment it says my bank account is invalid. I’ve thoroughly checked with my bank twice, 2 days in a row and there’s no issue with my checking account. I even successfully paid 2 other utility bills with it just to be sure it’s only EZ Pass that it’s not working for. It’s been 2 days now and I still can’t replenish my account.