Facebook is throwing "Please specify an image to run with this ad." when trying to create an Ad
I have the exact same issue. Found a workaround but it's not good enough for me since it needs a FB post or page to work. But maybe it's good enough for you. Possible workaround is to user object_story_spec like so:
await account.createAdCreative([], { name: "API TESTING", object_story_spec: { page_id: "34533453534534", link_data: { image_hash: adImageHash, link: "yourlinkhere.com" } }, body: adData.Body, appsecret_proof});