Urgent requires Reactjs & Expressjs expert

Urgent requires Reactjs & Expressjs expert I have a on going project. Suddenly on Server Side Render it is showing error "Invariant failed", if I make it NODE_ENV production but not on development Only bid if you can solve this problem. I will award you only if you solve the problem. I can share the react source code if you are willing to non disclose the code & delete it after the project is complete.