“Extract module to file” does not work

[jtojnar]

If I run LSP: Code Action on mod foo part of the following Rust file:

mod foo {}

The Extract module to file action is offered.

But when I invoke it, nothing happens and I see the following in the status bar:

Failed to apply code action: Client does not support create capability. (-32803)

ST: 4168
LSP: 1.28.0
LSP-r-a: 1.9.1