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How to fix dlg_flags_invalid_ca

Alton Alexander
By Alton AlexanderUpdated on June 3rd, 2022

The dlg_flags_invalid_ca error message is displayed when an invalid Certificate Authority (CA) is detected. This can happen if the computer is unable to connect to the CA's server, the CA's server is unavailable, or the CA's server is not responding. This error can also occur if the CA's certificate has expired or is not yet valid.

Users typically search for a solution by asking about:

  • error code dlg_flags_invalid_ca
  • error code: dlg_flags_invalid_ca

1. Remove invalid CA from the list of trusted CAs

  1. In the address bar, type chrome://settings/ and press Enter.
  2. Under "Advanced," click Manage certificates.
  3. Click Authorities. Find the website in the list.
  4. Select the website and click the Remove button.
  5. Close the Settings tab.

2. Use a different CA

If you're getting the dlg_flags_invalid_ca error, it means that your client is unable to validate the SSL certificate presented by the server. This can be caused by a number of factors, but the most common is that the server is using a self-signed certificate or a certificate from an unknown CA. In order to fix this error, you'll need to use a different CA. The best way to do this is to use a CA that is trusted by your client. If you're using a self-signed certificate, you can generate a new certificate using a trusted CA. If you're using a certificate from an unknown CA, you can either generate a new certificate using a trusted CA or import the CA's root certificate into your client.

3. Re-create the CA

If you receive the dlg_flags_invalid_ca error, you can re-create your CA by following these steps:

  1. Go to the Start menu, type mmc, and press Enter.
  2. On the File menu, click Add/Remove Snap-in.
  3. In the Add or Remove Snap-ins dialog box, click Certificates, and then click Add.
  4. In the Certificates snap-in dialog box, select Computer account, and then click Next.
  5. In the Select Computer dialog box, click Local computer: (the computer this console is running on), and then click Finish.
  6. In the Add or Remove Snap-ins dialog box, click OK.
  7. In the console tree, expand Certificates (Local Computer), expand Personal, expand Certificates, and then delete any certificates that are listed under Certificates.
  8. In the console tree, expand Certificate Templates.
  9. Right-click Certificate Templates, and then click New > Certificate Template to issue.
  10. In the Enable Certificate Templates dialog box, select Certificate Templates that will be enabled for issuance, and then click OK.
  11. Right-click the certificate template that you want to enable, and then click Properties.
  12. In the Properties dialog box, click the General tab, and make sure that the Enable Certificate Templates check box is selected.
  13. Click the Request Handling tab, and make sure that the Allow private key to be exported check box is selected.
  14. Click the Security tab, and then click Add.
  15. In the Select Users, Computers, or Groups dialog box, type Everyone, and then click OK.
  16. In the Permissions for Everyone dialog box, select the Allow check box for the Read and Enroll permissions, and then click OK.
  17. Click OK to close the Properties dialog box.
  18. In the console tree, expand Personal, and then click Certificates.
  19. On the Action menu, click All Tasks, and then click Request New Certificate.
  20. In the Certificate Enrollment dialog box, click Next.
  21. On the Request Certificates page, select the certificate template that you want to use, and then click Enroll.
  22. In the

4. Re-issue the certificate

If you receive the error message "The site's security certificate is not trusted!" or "The site's security certificate is invalid!" it means that the Certificate Authority (CA) that issued the certificate does not have a valid chain of trust. This can be caused by one of the following reasons: The CA that issued the certificate is not in the browser's list of trusted CAs. The CA that issued the certificate is in the browser's list of trusted CAs, but the certificate chain contains a certificate that is not from a trusted CA. The certificate chain contains a certificate that has been revoked by the CA. The certificate has expired. To fix this issue, you will need to re-issue the certificate from a valid CA. You can do this by following these steps:

  1. Go to the website where you received the error message.
  2. Click on the lock icon in the address bar.
  3. Click on the "Certificate information" link.
  4. Click on the "Details" tab.
  5. Click on the "Copy to File..." button.
  6. Click on the "Next" button.
  7. Select the "Base-64 encoded X.509" option.
  8. Click on the "Next" button.
  9. Enter a file name and location to save the certificate.
  10. Click on the "Next" button.
  11. Click on the "Finish" button.
  12. Send the certificate file to the CA.
  13. The CA will re-issue the certificate and send you a new certificate file.
  14. Install the new certificate file on the server.

5. Regenerate the certificate signing request (CSR)

  1. In the Keychain Access application, select the Certificates category in the sidebar.
  2. Locate the certificate that you wish to regenerate the CSR for, then right-click on it and select Get Info.
  3. In the Certificate Information window that appears, expand the Details section.
  4. Click on the arrow next to the field labeled Serial Number.
  5. A new window will appear with information about the certificate.
  6. Click on the Edit button in the top-right corner of the window.
  7. A new window will appear asking if you wish to edit the certificate.
  8. Click on the Generate CSR button.
  9. A new window will appear with information about the certificate signing request.
  10. Click on the Save button.
  11. Save the CSR to your computer.

6. Get a new certificate from a different CA

  1. Obtain a new certificate from a different CA.
  2. Follow the instructions from the CA on how to install the new certificate.
  3. Update the SSL configuration on the server to use the new certificate.
  4. Restart the server to pick up the new certificate.