What is the problem?
If you have received a message with a verification code from your bank, it could be that you have tried to log in from a new device, or Holded has tried to reconnect automatically without success.
How to resolve this
Go to Treasury > Accounts in the sidebar.
Click on the bank that has an error notification. Here are a couple of examples:
Follow the instructions from your bank to reconnect your account. Most often they will send you a code to your mobile phone to enter into the app that connects to their services, although others require you to log in to your online banking.