Method `rank` exists, but its trait bounds were not satisfied

I'm trying to compute a rank of a square 256x256 matrix. It works for smaller sizes (up to 127), but for anything bigger I get:
```
the method `rank` exists for struct `Matrix, nalgebra::Const<256_usize>, ArrayStorage>`, but its trait bounds were not satisfied
the following trait bounds were not satisfied:
`nalgebra::Const<256_usize>: DimMin>`
`nalgebra::Const<256_usize>: ToTypenum`rustc[E0599](https://doc.rust-lang.org/error-index.html#E0599)
dimension.rs(212, 1): doesn't satisfy `_: DimMin>`
dimension.rs(212, 1): doesn't satisfy `nalgebra::Const<256_usize>: ToTypenum`
```

It sounds like a pretty basic operation to do, and the matrices aren't THAT big. Is there an easy solution to this?
Many thanks!