Technical Issue : Internal Workflow Trigger Problem (Docker + Ngrok)

Hey everyone, I could use some help with an issue that I can’t figure out.

I’m running n8n in Docker and exposing it through Ngrok. My problem is that:

Error workflows aren’t triggering, even when a node clearly fails and is connected.
I also can’t trigger another workflow using “Call n8n Workflow” tool(multi-agent) approach, nothing fires

I feel like something is wrong with the way my instance handles triggers and workflow calls, especially when running behind Docker + ngrok, but I’m not sure what exactly.

Has anyone here dealt with this setup?

The first time this happened, I got super frustrated. I rewatched the same tutorial video 3–4 times, spent the whole day trying to solve it, and everything I studied ended up going over my head. Now I’m facing the same issue again with error workflows, and it’s making me wonder if there’s something wrong with how workflow-to-workflow triggers work in my setup. I can connect to google OAuth, receive Webhook calls and others working fine.

If anyone has experienced this setup before or knows what the root cause might be, your guidance would really help. Even a small clue could save me a ton of time.

Thanks in advanced 💖

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