Failed form propType: You provided a `value` prop to a form field without an `onChange` handler

You’ve put a value directly in your search input, I don’t see the benefit there because you already have a placeholder. You could either remove the value from:

<input type="text" className="form-control" placeholder="Search..." value="Search..."/>

to this:

<input type="text" className="form-control" placeholder="Search..." />

Or if you think you must have it, set it as defaultValue:

<input type="text" className="form-control" placeholder="Search..." defaultValue="Search..."/>

Documentation: https://facebook.github.io/react/docs/uncontrolled-components.html#default-values