worker dashboard replies "404: Not Found"

I'm getting `404: Not Found` from a worker dashboard.

I started a scheduler like this:

```
dask-scheduler
distributed.scheduler - INFO - -----------------------------------------------
distributed.http.proxy - INFO - To route to workers diagnostics web server please install jupyter-server-proxy: python -m pip install jupyter-server-proxy
distributed.scheduler - INFO - -----------------------------------------------
distributed.scheduler - INFO - Clear task state
distributed.scheduler - INFO - Scheduler at: tcp://192.168.0.226:8786
distributed.scheduler - INFO - dashboard at: :8787
distributed.scheduler - INFO - Register worker
distributed.scheduler - INFO - Starting worker compute stream, tcp://192.168.0.226:60632
distributed.core - INFO - Starting established connection
```

Then a worker like this:

```
dask-worker 192.168.0.226:8786
distributed.nanny - INFO - Start Nanny at: 'tcp://192.168.0.226:60630'
distributed.worker - INFO - Start worker at: tcp://192.168.0.226:60632
distributed.worker - INFO - Listening to: tcp://192.168.0.226:60632
distributed.worker - INFO - dashboard at: 192.168.0.226:60633
distributed.worker - INFO - Waiting to connect to: tcp://192.168.0.226:8786
distributed.worker - INFO - -------------------------------------------------
distributed.worker - INFO - Threads: 12
distributed.worker - INFO - Memory: 16.00 GiB
distributed.worker - INFO - Local Directory: /Users/davidchudzicki/dask-worker-space/worker-8gczlpbm
distributed.worker - INFO - -------------------------------------------------
distributed.worker - INFO - Registered to: tcp://192.168.0.226:8786
distributed.worker - INFO - -------------------------------------------------
distributed.core - INFO - Starting established connection
```

Then navigating to `http://192.168.0.226:60633` gives me: "404: Not Found"

distributed version is: `2022.2.0`