The default thumbnail image that normally appears on the Bookmark Widget is missing when I make a duplicate of a WAB. Obviously it's loosing the location to the default image. How do I tell it where to find the default image?
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Open the config_Basemap Gallery.json file on the new apps configs folder and see what the thumbnailUrl for each is path'd to.
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OK, so it still points to the app number of the original.
Prompting the follow on, how do I find the app number for each WAB?
When you open the app the app # is displayed in the address bar of your browser.