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The image is shown when sharing on Signal.

Hi Menno,

will connect on this via email, little bit easier to do it in dutch
in the meantime; can you install ochLogFiles (if you haven't already): this is a free tool I offer to active subscribers.
Now when you put ochOpenGraph into debug mode (via advanced settings of the plugin), it will start writing what it is doing and why to the logfiles.

based on that we have something to discuss.