Error error

Module parse failed: Unexpected token (11:4)
You may need an appropriate loader to handle this file type.
|   const scssClasses = classNames('btn', className);
|   return (
|     <button className={scssClasses} onClick={onClick} type={type}>
|       {children}
|     </button>


I have written the same code but this error shows up and is not getting resolved.Please help.