Hi! We have made sure this bug will be fixed in the next update, which should be released in a couple of weeks. In the meantime you can fix it by opening the file Didnapper 2/www/js/scipts/System/LoadScript.js in any text editor (for example Notepad) and putting this line of code there:
$gameSelfSwitches.setValue([4, 17, 'A'], false)
Then save your change to the LoadScript.js file and start the game. The picture being black should now be fixed.
Please let us know if this fixes your issue :)