n8n Workflows Vanish and Nodes Throw Undefined Errors
12 posts across 2 communities since Jul 2026; 92% from community.n8n.io.
“Data coming from a prvious matchHey everyone. i'm having a weird issue with my n8n workflow My workflow reaches a Switch node, but the execution fails there. The error seems related to the data coming from a previous Merge/IF node. I’m not really sure w”
“QuickBooks Send Invoice node throws "Cannot set properties of undefined (setting 'Content-Type')"”
“HELP! Suddenly I cannot find my workflows;can it be recovered”
Users are experiencing significant issues with the n8n automation platform, including losing workflows entirely, encountering errors in nodes (QuickBooks, WhatsApp, SSH), and facing difficulties with data retrieval. These problems indicate instability and a lack of reliability within the platform's core functionality.
SOURCES (12)
“Data coming from a prvious matchHey everyone. i'm having a weird issue with my n8n workflow My workflow reaches a Switch node, but the execution fails there. The error seems related to the data coming from a previous Merge/IF node. I’m not really sure w”
“Error Trigger workflow not firing in self-hosted n8n 2.36.8 (Production Webhook execution fails)”
N8N102 Course Section1: API Endpoint SendToPriorityQueue node Returning 404 (Workflow "Sh9XB44Rlbu5437j" Inactive
“Call n8n Workflow Tool - Workflow selector doesn't list workflows and Execute Workflow Trigger is missing (v2.30.4)”
“Hi, n8n noob here. I have been homelabbing for a while now and recently wanted to learn n8n and ollama deployment by getting hands-on (i like to learn by doing things on the fly). Here am trying to connect my ollama model to n8n to respond to my prompts like "go find all the docker containers running in my server". The model spits out the command it thinks is right to run on my server's cli and sends this for my approval using a Human in the loop review chat (HITL block on n8n). On”
“Workflow intermittently crashes and goes inactive on the same PDF file (n8n Cloud, Starter plan)”
“QuickBooks Send Invoice node throws "Cannot set properties of undefined (setting 'Content-Type')"”
“SSH node is getting an error "The connection is closed by SSH Server Current FSM is Disconnect"”