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    Expert tip

    Take a look at this blog post on how to set up Grid2 https://goo.gl/rxzbE6. A user related (in the email group on the source) that using older selenium libs solves this exception.

java.lang.NullPointerException: inputStream cannot be null	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:204)