WordPress not working in Chrome properly

One of my friend is asking about why WordPress is not working properly in Google Chrome.
When she is login to her WordPress website wp-admin and adding a new post its shrink and not allowing her to write in the box of writing. What should she do?
Here is asked but not received any suggestion by community. May be here she will get resolution.
Support.google.com/chrome/thread/130640546/wordpress-not-working-in-chrome?