react.Fragment error display Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.
tried to use the upgraded version and found that there was still an error
< React.Fragment >
<div className={styles.rowContainer}>{this.renderRowLeft()}</div>
<div className="segmenting-line" />
<div className={styles.rowContainer}>{this.renderRowRight()}</div>
</React.Fragment>
does anyone know the problem