Final answer:
To fix the problem with the code, the text 'Hello!' needs to be enclosed within double quotation marks.
Step-by-step explanation:
const Heading = () => { Hello!;};
The problem with this code is that the text Hello! is not enclosed within quotation marks. In JavaScript, strings must be enclosed within quotation marks in order to be treated as text. To fix this issue, you should enclose the Hello! within double quotation marks.
Here's the corrected code:
const Heading = () => { "Hello!";};