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When you opened Facebook or other web pages, you may have encountered the error message ERR_BAD_SSL_CLIENT_AUTH_CERT on your Google Chrome browser or other. This server requires a certificate for authentication and has not accepted the certificate sent by the browser. Your certificate may have expired or the server may not trust its editor. You can try again with another certificate if you have one, or you must obtain a valid certificate from another location.
Review and resolve conflicts with third-party software
Third-party Internet protection software, such as antivirus software, may also be responsible for this error. For one reason or another, they may recognize the website as malicious or less credible. This may block the website in your web browser. To solve this problem, I suggest that you check if a third-party software such as VPN, security software or add-on interferes and disable it. You can open your antivirus software and temporarily disable web protection and see if it helps.
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Setting the time and date
A common reason Windows users receive the ERR_BAD_SSL_CLIENT_AUTH_CERT is that the time and date of the local machine are not synchronized. This is all the more likely if you notice that the same sites refuse to load with different browsers.
Several users who encounter the same error message reported that the problem was completely resolved after updating the time and date on their system. Here is a quick guide to ensure that the time and date are set correctly:
- Press Windows + R to open a Run dialog box. Then type “ms-settings:dateandtime” and press Enter to open the Date & Time tab of the Application Settings.
- Under Date and Time, make sure that the automatic time setting and automatic time zone setting functions are enabled.
- Once the time and date have been updated, restart your computer and check that the problem is solved.
Changing the TLS/SSL3 and QUIC settings
As a temporary measure, you can try to disable TLS1.1 & TLS1.2 and enable SSL2 & SSL3 and see if it helps.
Follow the protocol corrections for SSL3/TLS and QUIC, which are some of the reasons for the error. If your antivirus or security software offers this setting, you can disable and view SSL/TLS filtering.
Fix for ESET Internet Security users
Open your ESET Internet Security and follow these instructions to correct the SSL certificate error on Google Chrome.
- On the Internet Security Suite home page, click on Configuration, then locate and open Advanced Configuration.
- Then click on “WEB AND EMAIL”.
- Disable SSL/TLS protocol filtering and click OK.
- Open your browser and use the “Ctrl+Shift+Delete” key combination to clear your browser’s history before opening the website of your choice. That’s all, then.
This fixes the ERR_BAD_SSL_CLIENT_AUTH_CERT chrome error problem.
https://stackoverflow.com/questions/36309562/err-bad-ssl-client-auth-cert
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