What does 'Only a ReactOwner can have refs.' mean?

Question

I have a simple react component with a form in it:

var AddAppts = React.createClass({
    handleClick:          


        

Answer 1

None of the given solutions worked for me, though they certainly helped show me where to look.

For some reason my project has two node_modules folders - one in the root directory and one a level up. I'm new to React so I don't know if this is normal or what. I'm just going with what Visual Studio gave me when I started a new project.

Anyway, I knew which module was causing the problem, and it happened to only exist in one of the node_modules folders.

I moved the problem module over to the other node_modules folder. Problem solved.