Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function but got: object

Question

I am getting this error:

Uncaught Error: Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/funct

Answer 1

In my case, that was caused by wrong comment symbols. This is wrong:

    /*{ oldComponent }*/
    { newComponent }

This is correct:

    {/*{ oldComponent }*/}
    { newComponent }

Notice the curly brackets