Tailscale Status result includes unknown error

Am hoping someone can tell me what this health check exception indicates. I’ve searched the forum and docs but can’t find any explanation.

Thanks in advance for any insight.

Health check:
- network-category: SetCategory: Exception occurred. (nil)

On this same machine if I run “tailscale netcheck” I get the expected report with this error at the top:

2022/06/23 14:52:42 tshttpproxy: winhttp: GetProxyForURL(“https://controlplane.tailscale.com/”): ERROR_INVALID_PARAMETER [unexpected]

The machine can resolve and ping controlplane.tailscale.com just fine.