Even though Google Chrome is a robust browser, it is plagued by a wide variety of hiccups and problems. The ERR_HTTP2_Inadequate_Transport_Security error is well-known for indicating incompatibility between Chrome and other browsers’ security protocols.

Fortunately, fixing this mistake is easier than it looks. The remedies we propose in this manual should make fixing the problem a breeze.

ERR_HTTP2_Inadequate_Transport_Security: How Can It Be Fixed?


Method 1. Try Erasing All of Your Browser’s Temporary Files and Data.

Cache files store information like your browsing history and data to speed up page loads. The cache files can become corrupted and cause your browser to crash unexpectedly if you don’t clean them regularly.

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Some websites require you to accept cookies in order to function properly. Errors like ERR_HTTP2_Inadequate_Transport_Security are one type of Chome error that can be triggered by an excessive number of cookies.

In light of this, you should routinely clean them out.

Step 1. To access Chrome’s preferences, launch the browser and click the menu button (three dots).

Step 2. To delete your internet history, go to Settings > Privacy > Clear Browsing Data > Time range > Clear data.

Method 2. Disable HTTP/2 on the Windows Server

After migrating from IIS to Windows Server, if you see the error ERR_HTTP2_Inadequate_Transport_Security, one workaround is to disable HTTP/2 on Windows Server.

Step 1. Launch Notepad as an administrator and paste in the following text.

Version 5.00 of Windows Registry Editor

[HKEY LOCAL MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters]



Step 2. To save the registry file, set the Save as type to All Files and give the file a name ending in “.reg.”

Step 3. If you right-click the registry file, you can select Run as administrator from the context menu.

Step 4. After making modifications to your Windows Server installation, you must restart the server for them to take effect.

Method 3. Update Google Chrome

If you’re using an older version of Chrome that’s missing some security mechanism, you’ll get the ERR_HTTP2_Inadequate_Transport_Security error message. This can be resolved by upgrading to the most recent version of your browser. You’ll need:

Step 1. Chrome’s configuration menu can be accessed from within the browser.

Step 2. Chrome will check for updates automatically if you use the About button.

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Method 4. Turn off Weak Cipher Suite in IIS Crypto

The Best Practices option in IISCrypto 3.0 allows you to turn off the use of vulnerable protocols and cypher suites. That is to say:

Step 1. In the left menu, select Cipher Suites, and then click Best Practice.

Step 2. If you’re using Windows Server, select Apply, and then restart the machine.