agent browser automation failed on customer portal proposal upload timed out

TL;DR

Fix this in the customer portal upload by acting on the exact message first: replace the browser upload with the portal file API where available, otherwise split the upload into a fresh browser session with the file size checked first, and confirm the portal lists the file before marking the step done. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one item, then rerun the full scope and reconcile the counts.

agent browser automation failed on customer portal proposal upload timed out

Use this when

• The operation in the customer portal upload fails with this exact message: agent browser automation failed on customer portal proposal upload timed out.
• The same failure repeats on retry with unchanged inputs.
• A proposal, quote or send is blocked until this item completes.

Not for this skill when

• The message is a permission or outage notice from the platform. Resolve that first, then return here if this error remains.
• The operation completes and you only disagree with its output. That is a quality review, not this failure.

Steps

1. Reproduce the failure with the smallest scope that still shows it in the customer portal upload, and copy the full message plus the proposal, quote or account involved into the run notes. Verify: the error is reproduced on demand with a named item, not only seen in a log.
2. Apply the specific fix for this error: replace the browser upload with the portal file API where available, otherwise split the upload into a fresh browser session with the file size checked first, and confirm the portal lists the file before marking the step done. Verify: the portal document list shows the uploaded proposal with the correct file size.
3. Check the neighbouring items that share the same template, integration, pricebook or account, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Compare the result against the source system in the customer portal upload so a silent partial success is caught before sign off. Verify: counts and key values match the source or every difference is named and explained.
5. Rerun the original operation in the customer portal upload on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the error, the fix applied and the evidence of success.

Why it happens

the browser session stalled on a large upload through the portal page and timed out before the portal confirmed receipt.

Variant phrasings

agent browser automation failed on customer portal proposal upload timed out

The verbatim form searchers paste from the terminal or console. Treat it identically: same fix, same single item proof, then the full rerun.

How to fix: agent browser automation failed on customer portal proposal upload timed out

The how-to phrasing for the same failure in the customer portal upload. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

Troubleshooting this failure in the customer portal upload

The symptom-first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

Compatibility: the customer portal upload at current versions, plus the platform API or console the query names; no extra tooling beyond the source system access needed to verify counts.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_dzqX9k7y2jeFVvv-2-RAaQ