How to solve permission denied error for phantom js in ubuntu?

I am working on a laravel project where I am trying to use php wrapper of phantom js made by jonnyw. I have done everything written in the docs.

I have downloaded the 32 bit executable file and set the path in my code, but it still gives me the following error: sh: 1: /usr/local/bin/: Permission denied

My code looks like this

$client = PhantomJs::getInstance();
$client->getEngine()->setPath('/usr/local/bin/');

I have read some related issues already.

I am using laravel 5.4 and 4.0 version of jonnnnyw/php-phantomjs.

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