Got the error "value must be string"

I dit this function:

function Wysiwyg() {
  const editor = React.useRef(null)
  const [content, setContent] = React.useState('')
  const config = {
    readonly: false, // all options from https://xdsoft.net/jodit/doc/
  }

  return (
    <JoditEditor
      ref={editor}
      value={content}
      config={config}
      // eslint-disable-next-line
      tabIndex={1} // tabIndex of textarea
      onBlur={(newContent) => setContent(newContent)}
      onChange={() => {}}
    />
  )
}

But when I click on the are I get an error message "value must be string".
I use React 16.13

Start by reproducing the error with the supplied Wysiwyg component using React 16.13, then trace how JoditEditor handles the value when the editor area is clicked. Done means the component can be focused and edited without the "value must be string" error while preserving string content.