You have unpaid balance and you will have to pay for the item before Apple will let you make additional downloads or updates. Apple cannot find a functioning payment method to use in association with making this purchase. Even if you do have adequate Apple Account balance, Apple may require a payment method (usually a credit or debit card) be present on your account (particularly if you are starting a subscription or trial). Even free apps may require the presence of a payment method, although it won't be charged if they are free. In addition, some items cannot be purchased with account balance.
Use the article https://support.apple.com/HT201266 to review your payment methods such as credit or debit cards. Problem methods will usually have a notice in red lettering below them. The article: https://support.apple.com/HT203005 has some information about declined payment methods.
Apple Support video with similar information: “What to do if you can’t make a purchase on your iPhone” https://www.youtube.com/watch?v=aKHOJFWOJHk
For information about updating payment methods on various platforms (iPhone, Mac, etc.), click here --> https://support.apple.com/HT213276
If there's an issue [such as you having a subscription or being a Family Sharing Organizer], add a new card first, then remove the old card.
If using Apple Account balance to pay for an item, ensure there is adequate balance to pay for the item, including tax if applicable. Read this article about how to check your Apple Account balance.--> https://support.apple.com/HT202359 Some purchases may require the presence of another payment method such as a credit card even if the final payment will be made by account balance.
If that fails to work, this support article has various country telephone numbers for contacting Apple for support and service ➔ https://support.apple.com/106932 The people on this forum (users like yourself) cannot do this for you.