Upon creating transaction, user may encounter the error below
Go to Maintenance > Default Interface Account
In default interface account, user may set the default posting of their transaction such as bank account, debtor’s and creditor’s control account, etc.
On the account column, click on the space area to select a GL Account
Double click on the GL Account code to set. Finally, click Save or Save and Close.
Go back to the transaction and save it. The error message must now be resolved.