For some reason Xero will not allow posting journal entries to the default Inventory account, which has an account type "Inventory".
To fix this, follow these steps:
- In Xero, create a new account with an account type of "Current Asset".
- Call the account something Xero Inventory and make sure you give it an account code.
- Login to Connex.
- Click submit at my connections.
- Scroll down to accounts.
- Change the first one to the new asset account that you created.