Hello, you can solve this error by specifying that the surface is thin (yes) through the options at the bottom left, located below the program's workbench. In addition, you can specify the thickness of this thin surface through the options in the same place.
To set a property like "As Thin/Layer" to "Yes" in a modeling or simulation context, such as in computational software or structural analysis tools, you generally need to follow specific steps depending on the software or environment you're using.