Issue with FiberFailure when using @effect/rpc in the playground

Ok, I get a

(FiberFailure) All fibers interrupted without errors.

(FiberFailure) All fibers interrupted without errors.

when trying to run a minimal

@effect/rpc

@effect/rpc

setup..

am I doing something stupid here?

https://effect.website/play#a6819dde9e6c

Issue with FiberFailure when using @effect/rpc in the playground - Effect Community