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  • Software and digital services
  • Web browsers

ERR_CACHE_MISS

ERR_CACHE_MISS in Google Chrome: the page asks to resubmit data

Verified with sources2 sourcesReviewed Oct 3, 2026
Technician coming? See the 2 steps they must show you

Risk level

Low

Usually safe to check without specialist tools.

Urgency

Low

Quick answer

The page needs information you entered earlier, for example in a form, to be submitted again, and the cache has no copy. Before resubmitting a payment or order, check whether the first one went through.

Safety first

Stop and check this first

  • If the page was a payment, order or booking, do not agree to resubmit until your account or email confirms the first operation did not complete.

Safe checks you can perform

  • How you reached the page
  • Whether the earlier submission was recorded
  • The page in Incognito mode
  • How the site answers form submissions

Leave these tasks to a qualified professional

  • Do not attempt this professional task: Give the result its own address
  • Do not attempt this professional task: Check for duplicate submissions

What a technician must be able to justify

Technician visit

These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.

These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.

  1. Give the result its own address

    What they doThe developer reviews the form flow; RFC 9110 describes 303 See Other so that the output of a POST request can be retrieved from a different address.

    They must show youthe flow with the redirect after submitting.

    In writingwhich forms were changed.

  2. Check for duplicate submissions

    What they doThe site's support searches its records for the same operation arriving twice at the stated time.

    They must show youthe recorded operations with times.

    In writingwhether a duplicate was cancelled.

Before accepting a part or repair

Nothing has been shown yet. Do not accept a part swap based on the code alone.

Follow these steps

Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.

  1. How you reached the page

    No special tools

    Who:
    you.
    How:
    recall whether you got there by pressing Back or reloading right after submitting a form, a payment or a search.
    Result that matters:
    whether the page was the result of a submission.
    If you came from a submission:
    the error is expected; open the page from the site's menu or link instead of reloading it.
    If you arrived through a normal link:
    it is not a resubmission; move on to the Incognito test.
    Evidence to keep:
    page name and the action you took before.

    Evidence: Google Chrome Help - Get help with common error messages in Chrome

  2. Whether the earlier submission was recorded

    No special tools

    Who:
    you.
    How:
    look for a confirmation email or the order or transaction history in your account on the site.
    Result that matters:
    whether the operation shows as completed.
    If it shows:
    do not submit again; the operation already exists.
    If it does not show:
    submit once more from the site's form.
    Evidence to keep:
    order number or a screenshot of the history with the time.

    Resubmitting a payment or order without checking can duplicate it.

    Evidence: Google Chrome Help - Get help with common error messages in Chrome

  3. The page in Incognito mode

    No special tools

    Who:
    you.
    How:
    open the same address in an Incognito window.
    Result that matters:
    whether it loads there without the error.
    If it loads in Incognito:
    it points to an extension or stored data; disable extensions and, if it persists, delete browsing data.
    If it fails the same way:
    rule out extensions; tell the site the address and the time.
    Evidence to keep:
    the result of each test noted down.

    Evidence: Google Chrome Help - Fix connection and loading errors in Chrome

  4. How the site answers form submissions

    Tools required

    Who:
    the site's developer.
    How:
    check whether the result page can only be obtained by submitting the form or whether the server redirects to an address that can be reloaded.
    Result that matters:
    whether the result page has its own address.
    If it only exists as the response to the submission:
    that explains the error on Back; it is the cause to fix.
    If it has its own address:
    the problem is not in the form flow; look at the visitor's extensions or cache.
    Evidence to keep:
    the form's request flow with method and response.

    Only the site's developer. If that is not you, do not do this: report the page and the action to them.

    Evidence: RFC 9110 - HTTP Semantics

Still not solved

If the error persists, stop here. See what the technician must do and show you.

Where this code applies

A code is meaningful only inside the right product and version context.

Primary scope

System
Software and digital services
Brand
Google Chrome
Product type
Web browsers

Known code variants

  • ERR_CACHE_MISS
  • ERR_CACHE_MISS (-400)
  • ERR_CACHE_MISS Chrome
  • net::ERR_CACHE_MISS

What it means

Chromium classes ERR_CACHE_MISS (-400) as a cache error: the cache does not have the requested entry. Chrome Help explains that the page needs information you entered earlier to be submitted again. It typically appears when you go back to or reload a page that was the result of submitting a form. It does not indicate a server fault or a connection problem: it means the page cannot be shown without repeating the submission.

Warnings and stop conditions

  • Mediumeditorial warning

    If the page was a payment, order or booking, do not agree to resubmit until your account or email confirms the first operation did not complete.

    Evidence: Google Chrome Help - Get help with common error messages in Chrome

Symptoms and causes

Probable causes · in order

  • Page obtained by submitting a formCommon

    The page you are trying to see was the response to submitted data. Without a cached copy, Chrome would need to repeat the submission.

    Evidence: Chromium source - net/base/net_error_list.h (network error list) · Google Chrome Help - Get help with common error messages in Chrome

  • Browsing data or an extension interferingPossible

    If the error also appears when opening the page from its normal link, an extension or the browser's stored data may be involved.

    Evidence: Google Chrome Help - Fix connection and loading errors in Chrome

Virtual technician

Does ERR_CACHE_MISS still appear after these checks?

Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.

Start diagnosis

Sources and technical references

  1. 1

    Chromium source - net/base/net_error_list.h (network error list)

    The Chromium Authors · 2026 · official_doc

  2. 2

    Google Chrome Help - Get help with common error messages in Chrome

    Google · 2026 · official_doc

Sources: Chromium source - net/base/net_error_list.h (network error list) · Google Chrome Help - Get help with common error messages in Chromereviewed 2026-10-03 · verified

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