Sometimes, when trying to share something on social media, a wrong image shows or no image at all. This can be caused by the cache of your internet browser. Delete your cache over the entire period and try again (later). More information about cache can be found in this article. Please note that it can take a while for the correct image to show: try again the next day.
In some cases, the social media platform can't find the image. You can ask it to "look" for it. Copy the link and paste it into the respective tool: