Getting URL in Unreal Engine 4

I recently encountered the following problem in Unreal Engine 4: i need to run an html project on the server and upload images from a third-party folder to the running project. There are already functions for downloading images from a third-party folder, but for this you need to specify the path to the folder with images. This is the problem. I can not get the path to the folder lying on the server. I tried functions like get project dir and others, but the path to the folder is displayed strange. Maybe someone knows what’s the matter? How to upload images from a third-party folder to the server?

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