REASON
The issue is due to the ledger account that is linked to the expense category is not provided with access to the employees subsidiary even though the expense category has been provided access to the subsidiary.
SOLUTION
Identify the expense category and its related the expense account.
- Go to setup> Accounting>Expense category.
- Click on view link of the expense category the employee have selected.
- Click on the expense account in the category.
- Edit the ledger account.
- Provide the subisidiary access by selecting employee subsidiary.
- Save it