SwarmUI says backend failed to start before it actually starts | SwarmUI | Page 1

smoky moon Jul 12, 2025, 5:19 PM

#

From the log, I think the issue is summarized by the title. And I can access the started ComfyUI through http://127.0.0.1:7821. But seems SwarmUI decide not to wait, for unknown reason.

https://paste.denizenscript.com/View/134759

SwarmUI v0.9.6.4 Server Log - 2025-07-13 01:16:58 | Paste #134759 |...

Content of Swarm Debug Log Paste #134759: SwarmUI v0.9.6.4 Server Log - 2025-07-13 01:16:58... pasted 2025/07/12 10:17:01 UTC-07:00, Paste length: 14045 characters across 146 lines, Content: `2025-07-13 01:16:22.693 [Init] === SwarmUI v0.9.6.4 Starting at 2025-07-13 01:16:22 === 2025-07-13 01:16:22.745 [Init] Prepping extension: SwarmUI...

distant fox Jul 12, 2025, 5:55 PM

#

smoky moon From the log, I think the issue is summarized by the title. And I can access the...

Do you have any VPN/Proxy/whatever running? I've seen issues like that when network software randomly gets in the middle of localhost connections

smoky moon Jul 13, 2025, 12:36 AM

#

Yes I have a proxy, but I'm not sure whether it affects because I excluded python from being proxied (btw that's also why I recommend make the link 127.0.0.1 instead of localhost because certain proxies cannot handle DNS of localhost)

#

I think a reconnect function may work here, currently i can only find button to restart backend

distant fox Jul 13, 2025, 12:43 AM

#

Should just fix the network wonk

#

change the address / disable the proxy / fix proxy config to not intercept localhost / whatever

#SwarmUI says backend failed to start before it actually starts