ERR_CACHE_MISS: What It Means and How to Fix It

What ERR_CACHE_MISS actually means

The browser has data in its cache that it needs to re-send to the server (a POST request), but no longer has that data. Refreshing would re-submit the form, so Chrome asks for confirmation. It is a browser cache/navigation state issue, not a network problem.

Most likely causes (ranked)

1. Refreshing a page that was reached via form submission (checkout, login, search)
2. Browser cache corruption after a crash
3. A web app that relies on POST requests for page navigation
4. Server redirects after form submission that were not handled correctly

How to fix ERR_CACHE_MISS

Step 1: Do not use the browser refresh button on form pages

After a form submission, use the site's navigation to return to the previous state rather than pressing F5 or Cmd+R. This avoids the re-submission entirely.

Step 2: Clear the browser cache

Chrome: Settings → Privacy and Security → Clear browsing data → Cached images and files. This clears stale POST data that triggers the error.

Step 3: Press F5 to confirm re-submission if appropriate

If you see a dialog asking 'Confirm Form Resubmission' and you intended to refresh, click Continue. Your data will be sent again.

Step 4: Open the URL in a new tab directly

Type or paste the page URL directly into a new tab to load a fresh GET request instead of a cached POST.

Step 5: Check the website for issues

If ERR_CACHE_MISS appears on initial visit (not a refresh), the site has a server-side caching misconfiguration. Contact the site owner.

Still not fixed? Rule out your connection

If the steps above did not clear the error, the next step is verifying the underlying internet connection is healthy. Run a speed test — if download, upload, and ping come back normal, the error is specific to one site or browser state. If the speed test also fails or shows packet loss, the problem is at the network or ISP layer.

Frequently Asked Questions

Is ERR_CACHE_MISS an internet connection problem?

No — it is a browser navigation state issue. Your internet connection is working normally. The error means the browser has a POST request in its queue that requires confirmation to replay.

How do I stop ERR_CACHE_MISS permanently?

On sites you control: implement the Post/Redirect/Get pattern — after a form submission, redirect to a GET URL so refreshing does not re-submit. On sites you visit: use the site's own navigation buttons rather than the browser refresh after checkout or login.

Does ERR_CACHE_MISS mean my data was not saved?

It depends on when the error appears. If you see it immediately after submitting a form, the submission may have partially completed. Check your account or email for confirmation before re-submitting.