Awesome—here’s a ready-to-post message for the n8n Community using their template, with your workflow embedded and the key details about the error and setup. You can copy/paste as-is, then fill in the few environment blanks.
Describe the problem/error/question
I’m uploading a file from a Form Trigger to Google Drive (Upload file). The upload intermittently fails in the UI with:
TypeError: Converting circular structure to JSON
--> starting at object with constructor 'Object'
| property 'res' -> object with constructor 'Object'
| property 'socket' -> object with constructor 'Object'
--- property '_httpMessage' closes the circle
The Form Trigger provides a single file field; the Google Drive node takes that binary and uploads it into a specific parent folder. I selected My Drive and set the destination folder using the Folder field (by URL mode).
I suspect the error is a frontend serialization issue (a circular response object being stringified). It appears when the Google Drive node evaluates inputs and tries to render/preview results.
Questions
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Is this a known serialization issue in the Google Drive node or UI preview?
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Is there any constraint with using the Folder parameter in URL mode vs a raw folder ID?
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Any recommended workaround (e.g., always passing a plain ID; disabling response preview; mapping only primitives)?
What is the error message (if any)?
TypeError: Converting circular structure to JSON
--> starting at object with constructor 'Object'
| property 'res' -> object with constructor 'Object'
| property 'socket' -> object with constructor 'Object'
--- property '_httpMessage' closes the circle
(Stack trace points to vue.runtime.esm-bundler...)
Please share your workflow
(Direct copy from my editor)
Share the output returned by the last node
The node fails before a JSON payload is shown; the UI throws the TypeError above. There’s no structured JSON result I can copy. If needed, I can enable execution logs and attach them.
Information on your n8n setup
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n8n version: 1.118.1
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Database (default: SQLite): SQLite
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n8n EXECUTIONS_PROCESS (default: own, main): main
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Running n8n via: Docker
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Operating system: n8nio/n8n:latest image
Extra notes / things I tried
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Using Folder as a URL (current config).
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Switching to a plain folder ID (paste only
1_IBtDweCJKQ1gyVD8PBTQhNKRp3osAFE) — seems more stable; does n8n v3 prefer IDs? -
Confirmed the binary field is
fileand the name is={{ $json.file.filename }}. -
Target is My Drive, not a Shared Drive (no extra flags needed).