Fix connection errors

You might get an error message on Chrome if there is a network connection issue.

Use the steps below to fix the problem.

"Your connection is not private" or "NET::ERR_CERT_AUTHORITY_INVALID" or "ERR_CERT_COMMON_NAME_INVALID"

If you see one of these errors, try these tips:

Step 1: Sign in to the portal

If you recently connected to a new Wi-Fi network that has a sign-in portal, try signing in.

  1. Go to any website starting with http://. The Wi-Fi portal sign-in page will open.
  2. Sign in to the portal to use the Internet.

Step 2: Try opening the webpage in Incognito mode (computer only)

Open the page in an incognito window. If the page opens, a Chrome extension is causing the error.

To fix the error, turn off Chrome extensions that impact your connection.

Step 3: Update Windows (computer only)

If you're using a Windows computer, make sure your operating system is up-to-date.

Step 4: Temporarily turn off your antivirus

You'll see this error if you have any antivirus software that provides "HTTPS protection" or "HTTPS scanning" that prevents Chrome from providing security.

To fix the problem, try turning off your antivirus software. If the webpage works after turning off the software, turn off this software when you use secure sites.

Remember to turn your antivirus program back on when you're done.

"Connect to network"

You'll see this error if you're using a Wi-Fi portal that requires you to sign in before you can get online.

To fix the error, click Connect on the page you're trying to open.

"Your clock is behind" or "Your clock is ahead" or "NET::ERR_CERT_DATE_INVALID"

You'll see this error if your computer or mobile device's date and time are inaccurate.

To fix the error, open your device's clock and make sure the time and date are correct.

"Server has a weak ephemeral Diffie-Hellman public key" or "ERR_SSL_WEAK_EPHEMERAL_DH_KEY"

You'll see this error if you're trying to go to a website that has outdated security code. Chrome protects your privacy by not letting you connect to these sites.

If you own this website, try updating your server to support ECDHE and turn off DHE. If ECDHE is unavailable, you can turn off all DHE cipher suites and use plain RSA.

"This webpage is not available" or "ERR_SSL_VERSION_OR_CIPHER_MISMATCH"

You'll see this error if you're trying to go to a website that has outdated security code. Chrome protects your privacy by not letting you connect to these sites.

If you own this website, try to set your server to use TLS 1.2 and TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, instead of RC4. RC4 is no longer considered secure. If you can't turn off RC4, make sure that other non-RC4 ciphers are turned on.

"This webpage has a redirect loop" or "ERR_TOO_MANY_REDIRECTS"

You'll see this error when Chrome stops because the page tried to redirect you too many times.

Sometimes, cookies can cause pages to not open properly. To fix the error, trying clearing your cookies.

"The server returned an invalid response"

You'll see this error if the webpage had an error that Chrome couldn't understand.

To fix the error, contact the website owner.

If you own this website, learn how to fix the ERR_SSL_FALLBACK_BEYOND_MINIMUM_VERSION error.

 

Still not working? If the tips above don't help, your connection might be compromised. You can get more help on the Chrome Help Forum.

Megan is a Google Chrome expert and the author of this help page. Help her improve this article by leaving feedback below.

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