add error message in else condition

Author: vaibhavahalpara

app/code/Magento/OfflineShipping/Model/Carrier/Freeshipping.php

@@ -98,6 +98,20 @@ public function collectRates(RateRequest $request)
 
             $result->append($method);
         }
+        elseif ($this->getConfigData('showmethod'))
+        {
+            $error = $this->_rateErrorFactory->create();
+            $error->setCarrier($this->_code);
+            $error->setCarrierTitle($this->getConfigData('title'));
+            $errorMsg = $this->getConfigData('specificerrmsg');
+            $error->setErrorMessage(
+                $errorMsg ? $errorMsg : __(
+                    'Sorry, but we can\'t deliver to the destination country with this shipping module.'
+                )
+            );
+
+            return $error;
+        }
 
         return $result;
     }