Invalid URL Error When Linking External n8n Workflow to AI Agent

Based on the error details you provided, the node is reporting an invalid URL—specifically:

• Error message in the Log:
  “Problem in node ‘n8n‘ Invalid URL”
• Error Code:
  ERR_INVALID_URL

This indicates that when using the Call n8n Workflow Tool, the URL (or identifier extracted from the external workflow URL) isn’t being recognized as a valid URL.

A few points to check:

• Correct Extraction: Make sure you’re extracting the proper part of the workflow URL as instructed. Even though the guide specifies using the “end letter/digits combination,” double-check that the value you’re pasting is complete and correctly formatted.
• Valid Format: Verify that the URL parameter (or identifier) you provide meets n8n’s expected format. If a protocol (e.g., https://) is required or if additional parts of the URL should be included, make sure nothing is missing or altered.
• No Extra Characters: Ensure there are no leading/trailing spaces or extra characters that might cause the URL to become malformed.

If these checks don’t resolve the issue, reviewing your extracted value against the guide may help to ensure that you haven’t missed a detail in the formatting rules provided there.

Let me know if you need further assistance troubleshooting this specific configuration.