React Error: Minified React error #119

Error: Minified React error #119; visit http://facebook.github.io/react/docs/error-decoder.html?invariant=119 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.

According to the console print, we can visit
http://facebook.github.io/react/docs/error-decoder.html?The page invariant=119 gets the following message:

The full text of the error you just encountered is:
addComponentAsRefTo(...): Only a ReactOwner can have refs. You might be adding a ref to a component that was not created inside a component's `render` method, or you have multiple copies of React loaded (details: https://fb.me/react-refs-must-have-owner).

Then check to see if the component in question USES the ref attribute outside of the render method. The problem I’m reporting here is the unexpected use of the ref attribute outside of the render method in the body center component of the create dialog.
debugging is hard, I have to say.
I hope I can help you.

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