It is not Flash, but another error:
Console:
swfobject.js Failed to load resource: the server responded with a status of 404 (Not Found)
HTML:
var so = new SWFObject(versionOfWdl+"?"+pathToWdlconfig, versionOfWdl, widthOfWdl, heightOfWdl, "8", backgroundColourOfWdl);
So it is not working on any browser I have here. Not on Edge/IE or Chrome.
Wim