WebDriverError: disconnected: unable to connect to renderer

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I had similar error. But versions were matching: I was using Chrome 65 with driver version 2.38.

I spent long time, trying to understand the issue.
At the end, found that it was caused by empty /etc/hosts file. Apparently Chrome communicates via localhost, and if such entry missing in /etc/hosts – it will crash.

So, make sure, it has entry like this:

127.0.0.1 localhost

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