Rustic opendal:b2 doesn't work on Windows

[douglasparker]

It works fine on Linux, but on Windows I get hit with:

[INFO] using config C:\Users\Douglas Parker\AppData\Roaming\rustic\config\rustic.toml
[WARN] service=b2 operation=stat path=keys\a78464a933185e874b3f08533249cef3dacdfc52c5895a86fefd4ab889400c6f -> NotFound (persistent) at stat, context: { service: b2, path: keys\a78464a933185e874b3f08533249cef3dacdfc52c5895a86fefd4ab889400c6f } => no such file or directory
error: incorrect password!

Same rustic.toml between platforms.