magento 2 Uncaught TypeError: Argument 1 passed to __construct() must be an instance of MagentoBackendBlockTemplateContext

In Magento 2.2 i have create a module and there i am getting this error.

Uncaught TypeError: Argument 1 passed to __construct() must be an
instance of MagentoBackendBlockTemplateContext, instance of
MagentoFrameworkObjectManagerObjectManager given

My file path

appcodeNamespaceModulenameBlockAdminhtmlExporterEditTabForm.php

<?php
namespace NamespaceModulenameBlockAdminhtmlExporterEditTab;

class Form extends MagentoBackendBlockWidgetFormGeneric implements MagentoBackendBlockWidgetTabTabInterface
{
protected $exporter;

public function __construct(
MagentoBackendBlockTemplateContext $context,
MagentoFrameworkRegistry $registry,
MagentoFrameworkDataFormFactory $formFactory,
RaveinfosysOrderexporterModelExporter $exporter,
array $data =
) {
$this->exporter = $exporter;
$this->_formFactory = $formFactory;

parent::__construct($context, $registry, $formFactory, $data);
}


please suggest me where is mistake.

Thank you

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