ERR_SSL_PROTOCOL_ERROR — What It Means & How to Fix It

What Does This Error Mean?

ERR_SSL_PROTOCOL_ERROR means your browser could not set up a secure (HTTPS) connection with the website. SSL (or TLS) is the technology that encrypts your connection — it is what makes the padlock icon appear in your browser. When the SSL handshake fails, your browser blocks the page rather than risk an insecure connection. The problem can be on the website's side, your computer's side, or both.

Affected Models

Google Chrome
Microsoft Edge
Chromium-based browsers
Windows
macOS
Android

Common Causes

Your computer's clock is set to the wrong date or time, which breaks SSL certificate validation
The website's SSL certificate is misconfigured, expired, or self-signed
Your antivirus software is intercepting HTTPS traffic and causing a conflict
An outdated version of Chrome or your operating system does not support the site's SSL protocol
Browser extensions (especially security or VPN extensions) are interfering with the SSL handshake

How to Fix It

Check your computer's date and time. Right-click the clock in the bottom-right corner of Windows and choose 'Adjust date/time'. Make sure the date, time, and time zone are all correct.

A wrong system clock is one of the most common and easily overlooked causes of SSL errors.
Clear your browser's SSL cache. In Chrome, go to Settings > Privacy and security > Clear browsing data. Select 'All time' and check 'Cached images and files'. Click Clear data.

Old cached SSL certificates can conflict with updated ones.
Disable browser extensions one by one, especially VPN, privacy, or security extensions. Reload the page after disabling each one to find the culprit.

Extensions that modify web traffic can break SSL connections.
Try opening the site in an Incognito window (Ctrl+Shift+N). This runs Chrome without extensions. If it works there, an extension is causing the problem.

Incognito mode disables all extensions by default.
Update Chrome. Click the three dots (menu) in the top right, go to Help > About Google Chrome. Chrome will check for and install any available update.

Older Chrome versions may not support newer SSL/TLS versions required by the site.

When to Call a Professional

If the error happens on your own website, check your SSL certificate in your hosting control panel. An expired or incorrectly installed certificate will need to be renewed and reinstalled. Contact your web host's support team — most can do this for you.

Frequently Asked Questions

Is it safe to bypass this error and visit the site anyway?

No, you should not bypass SSL errors lightly. SSL errors mean the secure connection could not be verified. If you proceed, your data — including passwords and payment details — may not be encrypted. Only bypass the error on sites you fully trust and are certain are legitimate.

Why does this only happen on one website?

If only one site triggers the error, the problem is almost certainly with that site's SSL certificate — not your computer. The certificate may be expired, misconfigured, or issued for the wrong domain name. Contact the site's support team to let them know.

Can antivirus software cause ERR_SSL_PROTOCOL_ERROR?

Yes. Some antivirus programs perform 'HTTPS scanning' by inserting themselves into your SSL connections. If their SSL scanning certificate conflicts with the site's certificate, you will see this error. Look for an 'HTTPS scanning' or 'web shield' option in your antivirus settings and try disabling it.