Edge Giving the Error Code DLG_FLAGS_INVALID_CA? Try These Recommended Fixes

Quick Fix

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DLG_FLAGS_INVALID_CA error code is an alarming error message that can put you at risk for identity theft. It is one of the error messages that you may encounter while visiting websites and can cause concerns such as “404 Not Found”, “Microsoft Edge crashed,” “This site is not secure,” and “Server not found”.


To be able to deal with the DLG_FLAGS_INVALID_CA error, you have to know what it is all about. In most cases, when this error code appears, it suggests that there is a problem with the website’s certificate. It could also mean that the site’s certificate is expired, not installed properly, or not recognized by your browser.

Generally speaking, this error code has something to do with a certain website’s certificate, which is something that can only be controlled by the owner of the website or an administrator. However, there are times when this error is triggered because of the default browser on the user’s end. If this is the case, you can try a few possible solutions to resolve it.

What to Do About DLG_FLAGS_INVALID_CA on Microsoft Edge?

If the error code DLG_FLAGS_INVALID_CA shows on Microsoft Edge or other browsers, here are some solutions you can try:

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1. Check Your Date and Time Settings.

Incorrect date and time settings are one common reason why SSL and certificate errors appear on Microsoft Edge while visiting a website. To know whether the website you are visiting is safe and secure, your browser tries to read the certificate first. It will then check its date and time and verify if they match the local date and time you have set.

If the values do not match, there is a chance that the certificate error DLG_FLAGS_INVALID_CA code will surface.

To fix this, you need to check your local date and time settings. Go to your taskbar and click on the current date and time. Choose the Adjust Date/Time option. Enable the Set Time Automatically option to let Windows sync your time with Microsoft’s server. Finally, reboot your computer to apply the changes.

2. Clear Your Browser Cache.

Another possible reason why the DLG_FLAGS_INVALID_CA error code appears is that your browser is loading the cached version of a certain website instead of reloading the updated one.

To fix the problem, try clearing your browser’s cache. The steps to clear a cache vary from one browser to another.

Microsoft Edge

  1. Open Microsoft Edge.
  2. Navigate to the menu section.
  3. Select Settings.
  4. Go to Clear Browsing Data.
  5. Click Choose What to Clear.
  6. Check all the boxes next to Cached data and files and Cookies and saved website data.
  7. Hit Clear.
  8. Restart Microsoft Edge.

Mozilla Firefox

  1. Open Mozilla Firefox.
  2. Go to History.
  3. Choose Clear Recent History.
  4. Under the Time Range drop-down menu, choose your desired date range. If you want to clear everything, click Everything.
  5. Click on the Details drop-down menu. Choose all applicable options.
  6. Hit Clear Now.
  7. Restart the browser.


  1. Open Google Chrome.
  2. In the URL bar, input chrome://settings/clearBrowserData.
  3. Mark the following options:
    • Browsing history
    • Cookies and other site data
    • Download history
    • Cached images and files
  4. Under the Time Range drop-down menu, select the date range for which you want all your cached information cleared.
  5. Hit Clear Data.
  6. Relaunch Google Chrome.

If you find the entire process of deleting your browser cache overwhelming, you may use a PC repair tool to automate everything. With a reliable repair tool, you can not only delete your browser cache but also get rid of unnecessary files in just a few clicks.

After clearing your browser’s cache, relaunch your browser and visit the website again.

3. Try Using Another Web Browser.

Oftentimes, the issue is with your web browser. The plugins and extensions you have currently installed might not be properly configured. Your proxy settings might also be incorrect.

To troubleshoot the problem, try using another web browser. For instance, if the error appears while using Microsoft Edge, you may use other browsers, such as Mozilla Firefox and Chrome.

4. Update Your Web Browser.

The DLG_FLAGS_INVALID_CA error may also occur due to an outdated browser version. To update your web browser, follow these steps:

  1. Go to the Start menu.
  2. Select Settings.
  3. Choose Updates and Security.
  4. Navigate to Windows Update.
  5. Click the Check for Updates Windows will then automatically connect to Microsoft’s servers and check for any available updates. If it finds one, it will be installed right away and you should have an updated version of Microsoft Edge.
  6. Restart your computer to apply the changes.

5. Speak with an Expert.

If you are in doubt, seek help from experts. Speak with a Microsoft professional and ask about the possible causes of the DLG_FLAGS_INVALID_CA error code and how to fix it. Just make sure you talk with a qualified and competent person. This way, you can guarantee that the solutions you get are based on the latest standards of the industry.

You may also send Microsoft a message and wait for their technical support team to respond. Send them a message here.

Other Available Options

When you see the DLG_FLAGS_INVALID_CA error code, you usually have three options. These include the following:

1. Fix It.

To ensure the problem does not appear again and again, this is your best option. Fix the error using any of the five solutions we have listed above.

2. Go Back to Safety.

If you are not ready to solve the problem, you can click the Back to Safety option. It will redirect you to the recent webpage you visited or to your default home page. To ensure you don’t get into trouble by visiting a malicious website, this is a recommended option.

3. Proceed to the Website.

If you are confident that the website you are visiting is safe and secure, you can click on the Proceed Anyway link and ignore the warnings.


It is true that the DLG_FLAGS_INVALID_CA error may make you question a certain website’s security, but it’s good to know that it can be resolved in some easy ways. You may start by changing your computer’s date and time settings. And then, clear your browser’s cache. If nothing worked, seek help from experts.

Do you know other ways to fix the DLG_FLAGS_INVALID_CA error? Share them with us by commenting on them below.

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