Magento 2 Type Error – Object Creation Issue

MageComp Has upgraded their extension after your post. so please download it and check it again. i have downloaded and compile and check everything. it's working good.

Component\Inquiry\Model\Resource\Requests\Collection is the namespace of your collection for your resource models, it already exists, "overriding" it or creating a virtual type with the namespace won't do much.

What you want to do in this specific case, where you are using a virtual type to pass to Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory, is add ...\Grid\Collection to the namespace.

Component\Inquiry\Model\Resource\Requests\Grid\Collection

What you can do now is use this virtual type and pass it as you're doing right now to Magento\Framework\View\Element\UiComponent\DataProvider\CollectionFactory using the collections argument.

Cache flush and you should be good to go.