Support » Everything else WordPress » NET::ERR_CERT_DATE_INVALID despite my certificate is valid

  • Resolved alo91191



    I’ve recently started to work for a car rental company as marketing technician.

    Unfortunately, their website, which had been made by a communication company, is total a mess.

    While I’m trying to resolve all the problems suggested by Page Speed and GTmatrix (without any lucks) there is a problem with the SSL certificate that I’m not able to fix.

    As I said, the certificate is valid but randomly the Google NET::ERR_CERT_DATE_INVALID appears saying that it’s expired. This happens to everyone so It’s not related to my computer.

    I thought it could be a cache problem so I tried to delete it and also deactivate WP-rocket but they didn’t work.

    What could it be?

    The page I need help with: [log in to see the link]

Viewing 6 replies - 1 through 6 (of 6 total)
  • It sounds like the date and time either on your computer is out of sync, or the server is out of sync. Are you using the right time zone in your php configuration, as well?

    First things first, check the Date and Time set on your computer, if these are wrong it probably explains how you got the ERR_CERT_DATE_INVALID error.

    Sometimes fixing this error is as simple as shutting down your browser and then restarting it. Other times a system reboot may work. However, there are a couple of instances where you’ll need to do a little more work to set things straight.

    Check your connection, if you’re connected to public WiFi or some other public network there’s a chance that your browser is right and you don’t actually have a secure connection. If that’s the case, stop browsing and resume when you’re on a more secure setup.

    Scan your computer with a trusted antivirus software, you may have malware of some sort that is causing the issue. Unfortunately we can’t provide you with info on how to fix every last piece of malware, but if your antivirus can’t, someone on the internet probably knows.

    Disable any third-party plugins you have running on Chrome. Sometimes these can cause unwanted problems.

    There are a few other crazy fixes like bringing down your firewall or modifying network settings. Don’t do that. If none of these fixes work, the issue could be site-side. But don’t sacrifice your security to connect to one website.`

    Moderator Yui



    – SSL certificates are not cached.
    – Its web server software area, not WordPress
    – Your certificate is expired
    Tue, 16 Mar 2021 22:03:35 UTC (expired 1 month and 13 days ago) EXPIRED
    – Your server using LetsEncrypt certificate, they are short-living and should usually have automatic prolongation via host control panel or system service.
    You should refer to hosting support or your operating system documentation and set up automatic prolongation for SSL certificates.

    You can scan for SSL problems using SSLLabs test:

    – It is also recommended to enable SSL session caching tickets (See webserver software documentation) and TLSv1.3

    Thread Starter alo91191


    This one says that it will be expired in May (as I knew) and Also ssllabs now says that it’s valid

    • This reply was modified 1 year, 3 months ago by alo91191.
    • This reply was modified 1 year, 3 months ago by alo91191.
    Moderator Yui



    SSLLabs detects use of alternative certificate.

    Certificate #1:
    Mon, 24 May 2021 22:01:59 UTC (expires in 24 days, 17 hours)

    Certificate #2: NO SNI, issued for other host.

    Certificate #3:
    Tue, 16 Mar 2021 22:03:35 UTC (expired 1 month and 13 days ago) EXPIRED

    Seems your Apache is misconfigured and loading old expired certificate.
    It is unexpected and unpredictable behavior, loading multiple certificates for same host is implemented for offering different types of certificates (RSA and ECDSA types), when used for same types of certs, the final behavior can be undefined, so they can be randomly used.

    • This reply was modified 1 year, 3 months ago by Yui.
    Thread Starter alo91191


    Thanks to the last message I’ve been able to resolve my issue. Thank you very much.

    Win + r. and type “certmgr.msc”
    Then, delete 3 items :
    R3 Certificate and DST ROOT CA X3
    To delete, just win + r “certmgr.msc” then go thru :

    Trusted Root Certification Authorities > Certificates
    Intermediate Certification Authorities > Certificates
    Third-party root Certification Authorities > Certificates
    Right click, and press delete

    To locate the right certificate :
    Just use Issued By and Expiration Date, search for certificate issued by DST ROOT CA X3, and expired around 29-30 sept 2021.

    Install new certificate :
    Download this :
    Double click it.
    Then, Choose Local Machine, Next
    Choose Place all Certificates in the following store, and then choose “Trusted Root Certification Authorities” folder
    Restart your PC
    Can find more ways to fix NET::ERR_CERT_DATE_INVALID error.

    • This reply was modified 10 months, 2 weeks ago by bencc.
    • This reply was modified 10 months, 2 weeks ago by bencc.
Viewing 6 replies - 1 through 6 (of 6 total)
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