MapsterMapper/Mapster

AI Summary: The user reports a `System.MissingMethodException` when using `Mapster.EFCore`'s `ProjectToType<T>().FirstOrDefaultAsync()` in combination with `IMapper.From()`. The operation works correctly if `IMapper.From()` is omitted, or if `FirstOrDefault()` (synchronous) is used instead of `FirstOrDefaultAsync()`. The issue points to a problem in how Mapster's async enumeration type is constructed when `IMapper` is involved.