Magento 2 Add Image Upload in Configuration issue “The base directory to upload file is not specified”

I am new in MAgento2, and I installed custom module of Magento 2.3 to add image file upload configuration in system.xml. But i encountred this isuue when i try to save the config : system.xml <?xml version=”1.0″?> <config xmlns:xsi=”http://www.w3.org/2001/XMLSchema-instance” xsi:noNamespaceSchemaLocation=”urn:magento:module:Magento_Config:etc/system_file.xsd”> <system> <tab id=”mageplaza” translate=”label” sortOrder=”10″> <label>Mageplaza</label> </tab> <section id=”helloworld” translate=”label” sortOrder=”130″ showInDefault=”1″ showInWebsite=”1″ showInStore=”1″> <class>separator-top</class>…

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