Hello @Muaz ,
Welcome to Microsoft Q&A forum.
Please make sure that you have created a folder named App_Themes
in your project folder, and also a subfolder(in App_Themes
folder) named default
. And then run your project again. If it doesn’t work, please try to clean and rebuild your project, or close VS then restart VS.(you may need to try this several times(2-3) or wait for several seconds)
Best Regards,
Tianyu
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