3823010 - Why report cannot be submitted and receive "No Approver defined" when user has default expense approver added? (Statement Reports)

User has Expense Default Approver added in his profile but he could not submit his report to his manager, and it says  "No Approver defined in next approval step" , why is that?

Report cannot be submitted and user received "No Approver defined" but default expense approver was added in user's profile. , KBA , CON-CA-USP , User Profile , CON-CA-USP-CRC , Credit Cards , CON-EXP-ADM-WFL-WL , Workflow , Problem