Using selenium server- standalone.jar Console error: unknown error: cannot get automation extension solution

unknown error: cannot get automation extension
Unknown error: unable to get automatic extension
The reason is that the version you downloaded from ChromeDriver is different from the version you browned from Chrome.
Solution, into this website: http://npm.taobao.org/mirrors/chromedriver
First take a look at your Version of Chrome. Click on the three dots in the top right corner. Then click on Help
Go to the following page

 
Then go to the site and find the version that corresponds to your browser

Click the corresponding version to download. Download, unzip, and copy the driver to the url you defined. That’s where the driver is written in the Java code.


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