Magento – setup:di:compile error | source class generation does not exist

The dataProvider class must be an existing class.

In your case you used PbuploadMediaGridDataProvider. I assumed that you based on development on what Magento does out of the box.

However, most of the time M2 uses a virtual type for the data provider classes.

I also assume that you want to use your Pinkblue\CatalogUpload\Model\ResourceModel\Media\Grid\Collection as the data provider.

To implement that you can add the following to your di.xml or create it :

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <virtualType name="PbuploadMediaGridCollectionFactoryForReporting" type="Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory">
        <arguments>
            <argument name="collections" xsi:type="array">
                <item name="pbupload_media_listing_data_source" xsi:type="string">Pinkblue\CatalogUpload\Model\ResourceModel\Media\Grid\Collection</item>
            </argument>
        </arguments>
    </virtualType>

    <virtualType name="PbuploadMediaGridReporting" type="Magento\Framework\View\Element\UiComponent\DataProvider\Reporting">
        <arguments>
            <argument name="collectionFactory" xsi:type="object">PbuploadMediaGridCollectionFactoryForReporting</argument>
        </arguments>
    </virtualType>

    <virtualType name="PbuploadMediaGridDataProvider" type="Magento\Framework\View\Element\UiComponent\DataProvider\DataProvider">
        <arguments>
            <argument name="reporting" xsi:type="object">PbuploadMediaGridReporting</argument>
        </arguments>
    </virtualType>
</config>

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