Merge pull request 'Fix form submission staying in draft status' (#13) from fix/submit-draft-status into master

Reviewed-on: #13

app/Services/ApprovalService.php

@@ -17,7 +17,7 @@ class ApprovalService
         $workflow = $travelRequest->workflow;
 
         if (! $workflow) {
-            return;
+            throw new \RuntimeException('No active approval workflow is configured.');
         }
 
         $steps = $workflow->steps()->orderBy('order')->get();