Hello there! I've been using KWGT for a long time now for some reason the si(wpcolor1) formula is not working. I tried clearing cache/storage, changing wallpaper, and checked older versions of the app but so far no result. I also tried it on different launchers but still no result. I am on the OnePlus 6 running Android 10 
For some reason I think KWGT is unable to read my wallpaper. As attached below, in the edit widget menu, when i change the preview background to 'Current Wallpaper', the preview remains dark gray.
Is this a device specific issue? What can I do to fix it?I tried it on a Xiaomi phone and everything works fine.
Any help would be appreciated. Cheers!