FieldMembers rule creation broken in 0.13

Hi,

I want to migrate from version 0.11 to 0.13 and facing an issue that I can't no longer create field member rules as the method after `Should()` is not returning a `FieldMembersShouldConjunction`. See the example below

<img width="599" height="178" alt="Image" src="https://github.com/user-attachments/assets/54cbf88a-2d2e-4379-ac7e-573d7f1e9c5c" />

Thanks in advance,
Michael