Void Journal Entry Permission for Custom Role

To be able to void Journal Entries, the user must have at least Create level of access for Make Journal Entry permission.

 

Here are the steps to resolve this :

1. Navigate to Setup > Users/Roles > Manage Roles. 
2. Edit the role of the User.
3. Under the Permissions tab > Transactions subtab > Make Journal Entry = Create.
4. Click Save.