Well the good news is, if your new updated linked card has the same number as your old expired card, you can still earn cash back. It will work fine with a new expiration date. The same thing with the 3 or 4 digit security code.
If the new card has a different number then you can go to manage card settings
, where you can link new cards, update expiration dates, delete any old linked cards and select which linked card you want to be your primary linked card which is where your payments are deposited to.