This error could occur for any field that utilizes a drop down box in the batch in FE. For instance, if your Journal is "Accounts Payable" in the drop down box in the batch, but your import file says "Account Payable" the error may occur due to a typographical error. 

Check the spelling of all rows in column for the field in question. Remove any unnecessary spaces.

If using the downloaded import template from How to Import Journal Entry Transactions ensure the entries in the column match exactly one of the options listed in the drop down menu of the Journal field in the batch.  Our import template has an example entry of JE which is not present in this drop down and will cause this error. 

Change the entry from JE to Journal Entry
User-added image