When you see the error message “Type ‘void’ is not assignable to type ‘ReactNode'”, it means that you are trying to assign a value of type `void` to a variable or prop that expects a value of type `ReactNode`.

In React, a `ReactNode` is a data type used to describe the children elements that can be rendered within a component. It can be anything that can be rendered, such as JSX elements, strings, numbers, arrays, etc. On the other hand, `void` represents the absence of any value. So, when the TypeScript compiler encounters an attempt to assign a `void` value to a `ReactNode`-expected property, it throws the mentioned error.

To resolve this error, you need to ensure that you are assigning a valid `ReactNode` to the respective variable or prop. Here are a few examples to clarify the solution:

    
import React from 'react';

// Example 1: Assigning JSX element as a ReactNode
const validNode1: React.ReactNode = 
Hello, World!
;

// Example 2: Assigning string as a ReactNode
const validNode2: React.ReactNode = 'Some text';

// Example 3: Assigning number as a ReactNode
const validNode3: React.ReactNode = 42;

// Example 4: Assigning an array of JSX elements as ReactNode
const validNode4: React.ReactNode = [
  
First paragraph
,
  
Second paragraph
];

// Example 5: Assigning a combination of JSX elements, strings, and numbers as ReactNode
const validNode5: React.ReactNode = [
Header
, 'Some text', 2022];

// Example 6: A functional component that returns a valid ReactNode
const MyComponent: React.FC = () => {
  const condition = true;
  if (condition) {
    return 
Condition is true
; // Valid ReactNode
  }
  return null; // Valid ReactNode (null represents no renderable content)
};
    
  

In each of the above examples, valid values of `ReactNode` are assigned and will not cause the error. You should adjust your code accordingly to provide a value that React can render correctly.