I'm Using UI component to upload an image but it throws this error
Fatal error: Uncaught TypeError: Argument 2 passed to Magento\Framework\View\Element\UiComponentFactory::argumentsResolver() must be of the type array, null given, called in C:\xampp\htdocs\Magento\vendor\magento\framework\View\Element\UiComponentFactory.php on line 220 and defined in C:\xampp\htdocs\Magento\vendor\magento\framework\View\Element\UiComponentFactory.php:172 Stack trace: #0 C:\xampp\htdocs\Magento\vendor\magento\framework\View\Element\UiComponentFactory.php(220): Magento\Framework\View\Element\UiComponentFactory->argumentsResolver('banner', NULL) #1 C:\xampp\htdocs\Magento\vendor\magento\module-ui\Component\Form\Field.php(84): Magento\Framework\View\Element\UiComponentFactory->create('banner', 'imageUploader', Array) #2 C:\xampp\htdocs\Magento\vendor\magento\framework\View\Layout\Generator\UiComponent.php(159): Magento\Ui\Component\Form\Field->prepare() #3 C:\xampp\htdocs\Magento\vendor\magento\framework\View\Layout\Generator\UiComponent.php(156): Magento\Framework\View\Layout\Generator\UiComponent->prepareC in C:\xampp\htdocs\Magento\vendor\magento\framework\View\Element\UiComponentFactory.php on line 172
My Code for Image Uploader is
<field name="banner">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="dataType" xsi:type="string">string</item>
<item name="source" xsi:type="string">flashsalespro</item>
<item name="dataScope" xsi:type="string">banner</item>
<item name="label" xsi:type="string" translate="true">Upload Banner</item>
<item name="visible" xsi:type="boolean">true</item>
<item name="formElement" xsi:type="string">imageUploader</item>
<item name="sortOrder" xsi:type="number">150</item>
<item name="elementTmpl" xsi:type="string">ui/form/element/uploader/uploader</item>
<item name="previewTmpl" xsi:type="string">PME_FlashSalesPro/image-preview</item>
<item name="required" xsi:type="boolean">false</item>
<item name="notice" xsi:type="string" translate="true">Upload image for sales background.</item>
<item name="uploaderConfig" xsi:type="array">
<item name="url" xsi:type="url" path="sales/index/upload"/>
</item>
</item>
</argument>
</field>
