"Processing Resources failed" compile-time error is thrown when the following nuget packages are referenced together:
It is enough only to reference the packages and try to build the project.
The error appears also if you try to reference the .dll instead of nuget packages. But only in case the Telerik.WinUI.Controls.dll file is not referenced from the installation folder of the Telerik Reporting product.
1>WINAPPSDKGENERATEPROJECTPRIFILE : error : PRI175: 0x80073b0f - Processing Resources failed with error: Duplicate Entry. 1>WINAPPSDKGENERATEPROJECTPRIFILE : error : PRI222: 0x80073b0f - Unspecified error occurred.