Error pairing with Hue Bridge

[poolski]

Here's a fun one.

With a fresh setup:

• Freshly-installed official Hue app (iOS 26)
• Fresh install of Bifrost on its own VM from source (to avoid weird Home Assistant port collisions with :80/:443)
• New certificate generated, etc

I'm getting pairing errors:

Nov 04 23:19:18 bifrost bifrost[548]: bifrost::server: Config changed, saving..
Nov 04 23:22:13 bifrost bifrost[548]: bifrost::routes::api: post: b"{\"devicetype\":\"Hue#iPhone\",\"generateclientkey\":true}"
Nov 04 23:22:13 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:14 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:15 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:16 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:17 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:18 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:20 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:21 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:21 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:22 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
Nov 04 23:22:23 bifrost bifrost[548]: bifrost::routes: V1 request failed: No such file or directory (os error 2)
... etc

I'm running Bifrost under systemd:

root@bifrost:~# systemctl cat bifrost
# /etc/systemd/system/bifrost.service
[Unit]
Description=Bifrost Hue Emulator
After=network.target

[Service]
ExecStart=/usr/local/bin/bifrost
Restart=on-failure
WorkingDirectory=/etc/bifrost

[Install]
WantedBy=multi-user.target

Here's the extra weird thing: when I copy config.yml to ~/ and run bifrost in the shell, it came up fine, paired, and even showed the Z2M groups I'd created.

Then I cp *.yml /etc/bifrost/ && cp cert.pem /etc/bifrost/ and started Bifrost again. It worked!

Fun fun fun! I couldn't track down where V1 request failed... was coming from in the code, but then I'm not familiar with Rust so 🤷🏻
Any ideas?