Mailchimp node is not working

[Gouravdev]

Describe the problem/error/question

My workflow is getting failed continues and giving error related to Error: Invalid URI "undefined/3.0/lists/8abcedb981/members"

What is the error message (if any)?

Please share your workflow

(Select the nodes on your canvas and use the keyboard shortcuts CMD+C/CTRL+C and CMD+V/CTRL+V to copy and paste the workflow.)

Share the output returned by the last node

ERROR: Error: Invalid URI “undefined/3.0/lists/8abcedb981/members”

Information on your n8n setup

• n8n version: 0.228.2
• Database (default: SQLite):
• n8n EXECUTIONS_PROCESS setting (default: own, main): default
• Running n8n via (Docker, npm, n8n cloud, desktop app): Docker
• Operating system: MAC

[MutedJam]

Hi @Gouravdev, seeing n8n tries to call undefined, are you by any chance sending more than one item to your Mailchimp node but have only one item coming out of your SplitInBatches node?

The node itself is working fine when testing it just now, so I suspect this could be a problem with your expression: