update code

Author: rogerdz

app/code/Magento/Webapi/Controller/Rest/SynchronousRequestProcessor.php

@@ -7,6 +7,7 @@
 
 namespace Magento\Webapi\Controller\Rest;
 
+use Magento\Framework\Webapi\Exception as WebapiException;
 use Magento\Framework\Webapi\Rest\Response as RestResponse;
 use Magento\Framework\Webapi\ServiceOutputProcessor;
 use Magento\Framework\Webapi\Rest\Response\FieldsFilter;
@@ -92,7 +93,11 @@ public function process(\Magento\Framework\Webapi\Rest\Request $request)
         /**
          * @var \Magento\Framework\Api\AbstractExtensibleObject $outputData
          */
-        $outputData = call_user_func_array([$service, $serviceMethodName], $inputParams);
+        try {
+            $outputData = call_user_func_array([$service, $serviceMethodName], $inputParams);
+        } catch (\Throwable $e) {
+            throw new WebapiException(__($e->getMessage()));
+        }
         $outputData = $this->serviceOutputProcessor->process(
             $outputData,
             $serviceClassName,

lib/internal/Magento/Framework/Webapi/ServiceInputProcessor.php

@@ -7,7 +7,6 @@
 
 namespace Magento\Framework\Webapi;
 
-use Laminas\Code\Reflection\ClassReflection;
 use Magento\Framework\Api\AttributeValue;
 use Magento\Framework\Api\AttributeValueFactory;
 use Magento\Framework\Api\SearchCriteriaInterface;
@@ -23,8 +22,9 @@
 use Magento\Framework\Phrase;
 use Magento\Framework\Reflection\MethodsMap;
 use Magento\Framework\Reflection\TypeProcessor;
-use Magento\Framework\Webapi\CustomAttribute\PreprocessorInterface;
 use Magento\Framework\Webapi\Exception as WebapiException;
+use Magento\Framework\Webapi\CustomAttribute\PreprocessorInterface;
+use Laminas\Code\Reflection\ClassReflection;
 use Magento\Framework\Webapi\Validator\IOLimit\DefaultPageSizeSetter;
 use Magento\Framework\Webapi\Validator\ServiceInputValidatorInterface;
 
@@ -564,8 +564,6 @@ private function processComplexTypes($data, $type)
 
         if (!$isArrayType) {
             return $this->_createFromArray($type, $data);
-        } elseif (!is_array($data)) {
-            throw new InvalidArgumentException(__('Not all parameters valid.'));
         }
 
         $result = is_array($data) ? [] : null;